Maintenance Event Codes (EVENTCODE)

If you want to find patents based on what has happened in their US maintenance / renewal history, use the EVENTCODE field code.

There are over 160 EVENTCODES which you can query.  Many codes have been deprecated and will no longer be found on current patents.  To see a full list of EVENTCODES, open the Help>Cheat Sheet and hover your mouse over the EVENTCODE field code to open the dockable tooltip.

AcclaimIP processes maintenance events weekly.

Where to Find Maintenance Event Codes in AcclaimIP

Where to Find Maintenance Event Codes in AcclaimIP

Open a document details and click the Maintenance Events tab (1).  The grid shows a list of all the maintenance events associated with the patent.  The EVENTCODES can be seen in the "Code" column (1).

View Maintenance Event Codes

View Maintenance Event Codes

Click the Help icon on the AcclaimIP desktop.  Put the Cheat Sheet in focus (1).  Hover your mouse over EVENTCODE (2) and the EVENTCODE tooltip will appear.  This is a scrollable tooltip which will not dismiss until you click the [x] in the upper right corner (3).

Examples

  • EVENTCODE:EXPX --> Finds Patents Reinstated after having previously expired
  • EVENTCODE:(M1554 OR M1555 OR M1556)  -->  Finds patents that were paid late (note, there is a different code for paying late at each of the three renewal tranches)
  • EVENTCODE:EXP.  -->  Finds expired patents

List of Event Codes

Use one or more of the codes below in your EVENTCODE query to find US patents with particular maintenance codes.

Event Code Description

ASPN Payor Number Assigned.

EXP. Patent Expired for Failure to Pay Maintenance Fees.

EXPX Patent Reinstated After Maintenance Fee Payment Confirmed.

F160 Maintenance Fee Has Already Been Paid. Refund is scheduled.

F161 Maintenance Fee Tendered too Early. Refund is scheduled.

F162 Maint Fee Payment Does Not Properly Identify the Patent.

F163 M.F.Payment/Certificate of Mailing Untimely, 37 CFR 1.8

F164 M.F.Payment/Express Mail Procedures Untimely, 37 CFR 1.10

F165 M.F.Payment Sent With Fees for Other Purposes - Will Refund.

F166 M.F. Payment not Accepted/Not Immed, Negotiable/Returned

F167 Check/Deposit Account Authorization is Unsigned - Returned.

F168 Payment Received - Balance in Deposit Account Insufficient.

F169 Payment is in Excess of Amount Required. Refund Scheduled.

LSM1 Pat Hldr no Longer Claims Small Ent Stat as Indiv Inventor.

LSM2 Pat Hldr no Longer Claims Small Ent Stat as Small Business.

LSM3 Pat Hldr no Longer Claims Small Ent Stat as Nonprofit Org

LTOS Pat Holder Claims Small Entity Status

M1461 Payment of Filing Fees under 1.28(c)

M1551 Payment of Maintenance Fee, 4th Year, Large Entity

M1552 Payment of Maintenance Fee, 8th Year, Large Entity

M1553 Payment of Maintenance Fee, 12th Year, Large Entity

M1554 Surcharge for Late Payment, Large Entity

M1555 7.5 yr surcharge - late pmt w/in 6 mo, Large Entity.

M1556 11.5 yr surcharge- late pmt w/in 6 mo, Large Entity.

M1557 Surcharge, Petition to Accept Pymt After Exp, Unavoidable

M1558 Surcharge, Petition to Accept Pymt After Exp, Unintentional

M1559 Payment of Maintenance Fee under 1.28(c)

M170 Payment of Maintenance Fee, 4th Year, PL 96-517

M171 Payment of Maintenance Fee, 8th Year, PL 96-517

M172 Payment of Maintenance Fee, 12th Year, PL 96-517

M173 Payment of Maintenance Fee, 4th Year, PL 97-247

M174 Payment of Maintenance Fee, 8th Year, PL 97-247

M175 Payment of Maintenance Fee, 12th Year, PL 97-247

M176 Surcharge for Late Payment, PL 96-517

M177 Surcharge for Late Payment, PL 97-247

M178 Surcharge, Petition to Accept Payment After Expiration

M181 7.5 yr surcharge - late pmt w/in 6 mo, Large Entity

M182 11.5 yr surcharge- late pmt w/in 6 mo, Large Entity

M183 Payment of Maintenance Fee, 4th Year, Large Entity

M184 Payment of Maintenance Fee, 8th Year, Large Entity

M185 Payment of Maintenance Fee, 12th Year, Large Entity

M186 Surcharge for Late Payment, Large Entity

M187 Surcharge, Petition to Accept Pymt After Exp, Unavoidable

M188 Surcharge, Petition to Accept Pymt After Exp, Unintentional

M2551 Payment of Maintenance Fee, 4th Yr, Small Entity

M2552 Payment of Maintenance Fee, 8th Yr, Small Entity

M2553 Payment of Maintenance Fee, 12th Yr, Small Entity

M2554 Surcharge for late Payment, Small Entity

M2555 7.5 yr surcharge - late pmt w/in 6 mo, Small Entity

M2556 11.5 yr surcharge- late pmt w/in 6 mo, Small Entity

M273 Payment of Maintenance Fee, 4th Yr, Small Entity, PL 97-247

M274 Payment of Maintenance Fee, 8th Yr, Small Entity, PL 97-247

M275 Payment of Maintenance Fee,12th Yr, Small Entity, PL 97-247

M277 Surcharge for Late Payment, Small Entity, PL 97-247

M281 7.5 yr surcharge - late pmt w/in 6 mo, Small Entity

M282 1.5 yr surcharge- late pmt w/in 6 mo, Small Entity

M283 Payment of Maintenance Fee, 4th Yr, Small Entity

M284 Payment of Maintenance Fee, 8th Yr, Small Entity

M285 Payment of Maintenance Fee, 12th Yr, Small Entity

M286 Surcharge for late Payment, Small Entity

M695 Payment of Maintenance Fee under 1.28(c)

M699 Payment of Filing Fees under 1.28(c)

PMFD Petition Related to Maintenance Fees Denied/Dismissed

PMFG Petition Related to Maintenance Fees Granted

PMFP Petition Related to Maintenance Fees Filed

R1461 Refund - Payment of Filing Fees under 1.28(c)

R1461 Refund - Payment of Filing Fees under 1.28(c)

R1551 Refund - Payment of Maintenance Fee, 4th Year, Large Entity

R1552 Refund - Payment of Maintenance Fee, 8th Year, Large Entity

R1553 Refund - Payment of Maintenance Fee, 12th Year, Large Entity

R1554 Refund - Surcharge for Late Payment, Large Entity

R1555 Refund - 7.5 yr surcharge - late pmt w/in 6 mo, Large Entity

R1556 Refund - 11.5 yr surcharge - late pmt w/in 6 mo, Large Entity

R1557 Refund - Surcharge, Petition to Accept Pymt After Exp, Unavoidable.

R1558 Refund - Surcharge, Petition to Accept Pymt After Exp, Unintentional.

R1559 Refund - Payment of Maintenance Fee under 1.28(c)

R160 Refund Processed. Maintenance Fee Has Already Been Paid.

R161 Refund Processed. Maintenance Fee Tendered too Early.

R165 Refund Processed. Maintenance Fees Mixed With Other Fees.

R169 Refund of Excess Payments Processed.

R170 Refund - Payment of Maintenance Fee, 4th Year, PL 96-517.

R171 Refund - Payment of Maintenance Fee, 8th Year, PL 96-517.

R172 Refund - Payment of Maintenance Fee, 12th Year, PL 96-517.

R173 Refund - Payment of Maintenance Fee, 4th Year, PL 97-247.

R174 Refund - Payment of Maintenance Fee, 8th Year, PL 97-247.

R175 Refund - Payment of Maintenance Fee, 12th Year, PL 97-247.

R176 Refund - Surcharge for Late Payment, PL 96-517.

R177 Refund - Surcharge for Late Payment, PL 97-247.

R178 Refund - Surcharge, Petition to Accept Payment After Expiration.

R181 Refund - 7.5 yr surcharge - late pmt w/in 6 mo, Large Entity

R182 Refund - 11.5 yr surcharge - late pmt w/in 6 mo, Large Entity

R183 Refund - Payment of Maintenance Fee, 4th Year, Large Entity

R184 Refund - Payment of Maintenance Fee, 8th Year, Large Entity

R185 Refund - Payment of Maintenance Fee, 12th Year, Large Entity

R186 Refund - Surcharge for Late Payment, Large Entity

R187 Refund - Surcharge, Petition to Accept Pymt After Exp, Unavoidable.

R188 Refund - Surcharge, Petition to Accept Pymt After Exp, Unintentional.

R2551 Refund - Payment of Maintenance Fee, 4th Yr, Small Entity

R2552 Refund - Payment of Maintenance Fee, 8th Yr, Small Entity

R2553 Refund - Payment of Maintenance Fee, 12th Yr, Small Entity

R2554 Refund - Surcharge for late Payment, Small Entity

R2555 Refund - 7.5 yr surcharge - late pmt w/in 6 mo, Small Entity.

R2556 Refund - 11.5 yr surcharge- late pmt w/in 6 mo, Small Entity.

R273 Refund - Payment of Maintenance Fee, 4th Yr, Small Entity, PL 97-247.

R274 Refund - Payment of Maintenance Fee, 8th Yr, Small Entity, PL 97-247.

R275 Refund - Payment of Maintenance Fee,12th Yr, Small Entity, PL 97-247.

R277 Refund - Surcharge for Late Payment, Small Entity, PL 97-247.

R281 Refund - 7.5 yr surcharge - late pmt w/in 6 mo, Small Entity.

R282 Refund - 11.5 yr surcharge- late pmt w/in 6 mo, Small Entity

R283 Refund - Payment of Maintenance Fee, 4th Yr, Small Entity

R284 Refund - Payment of Maintenance Fee, 8th Yr, Small Entity

R285 Refund - Payment of Maintenance Fee, 12th Yr, Small Entity

R286 Refund - 3.5 yr surcharge - late pmt w/in 6 mo, Small Entity

R669 Refund - Payment of Filing Fees under 1.28(c)

R695 Refund - Payment of Maintenance Fee under 1.28(c)

REM. Maintenance Fee Reminder Mailed.

RMPN Payer Number De-assigned.

SM01 Pat Holder Claims Small Entity Status - Indiv Inventor.

SM02 Pat Holder Claims Small Entity Status - Small Business.

SM03 Pat Holder Claims Small Entity Status - Nonprofit Org.

STOL Pat Holder no Longer Claims Small Entity Status

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