Also listed on Dow Global Technologies LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Sep 23, 2021 (JPMorgan Chase Bank, N.A.).
Term ends Jun 20, 2033 · High confidence
20-year base term ends Dec 20, 2031
Held by W. R. Grace & Co. - Conn.
Filed Jun 12, 2013 as application 13/993,503 · Granted Jul 23, 2019
Base term plus 548 days of patent term adjustment (USPTO delay)
Today
2011
2033
Clock starts
Dec 20, 2011
Dec 20, 2011
Term ends
Jun 20, 2033
Jun 20, 2033
Granted
Jul 23, 2019
Jul 23, 2019
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
548
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
99
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 548 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Dec 20, 2011, when application PCT/US2011/066013, the earliest non-provisional in its chain, was filed (this one was filed Jun 12, 2013) | Dec 20, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +548 days, USPTO patent term adjustment record | Jun 20, 2033 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jun 20, 2033 | High confidence |
This family
| US 7,601,664 | Term ended no later than Feb 2022 | no later than Feb 2022 |
| US 7,166,553 | Lapsed on the fee record Jan 2019 | Jan 2019 |
| US 7,141,635 | Lapsed on the fee record Nov 2018 | Nov 2018 |
| US 7,365,039 | Lapsed on the fee record Apr 2020 | Apr 2020 |
| US 7,521,512 | Lapsed on the fee record Apr 2017 | Apr 2017 |
| US 7,491,670 | Term ended Sep 2024 | Sep 2024 |
| US 7,393,806 | Lapsed on the fee record Jul 2016 | Jul 2016 |
| US 7,420,021 | Lapsed on the fee record Sep 2016 | Sep 2016 |
8 of 99 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Feb 4, 2014 Reel 32159, frame 384 | W.R. Grace & Co.-Conn. | Goldman Sachs Bank USA, as the Collateral Agent | Security Agreement |
| Mar 28, 2014 Reel 32554, frame 730 | Dow Global Technologies LLC; Union Carbide Chemicals & Plastics Technology LLC | W. R. Grace & Co. Conn. | Assignment of Assignor's Interest |
| Apr 2, 2014 Reel 32589, frame 554 | Dow Global Technologies LLC; Union Carbide Chemicals & Plastics Technology LLC | W. R. Grace & Co. - Conn. | Corrective Assignment to Correct the Assignee Name to "W. R. Grace & Co. - Conn." Previously Recorded on Reel 032554 Frame 0730. Assignor(S) Hereby Confirms the Assignee Name Was Previously Incorrectly Listed in the Recordation Cover Sheet Dated 3/28/2014 as "W. R. Grace & Co. Conn.". |
| Apr 29, 2014 Reel 32774, frame 130 | Chen, Linfeng; Leung, Tak W.; Tao, Tao; Gao, Kuanqiang | Dow Global Technologies LLC | Assignment of Assignor's Interest |
| Apr 3, 2018 Reel 45828, frame 683 | W. R. Grace & Co.-Conn. | Goldman Sachs Bank USA, as Collateral Agent | Security Interest |
| Apr 3, 2018 Reel 45832, frame 887 | Goldman Sachs Bank USA, as the Collateral Agent | W.R. Grace & Co.-Conn. | Release of Security Agreement Recorded at Reel/Frame No.: 032159/0384 |
| Sep 23, 2021 Reel 57594, frame 26 | Goldman Sachs Bank USA | W. R. Grace & Co.-Conn. | Release of Security Interest |
| Sep 23, 2021 Reel 57594, frame 104 | W. R. Grace & Co.-Conn. | Jpmorgan Chase Bank, N.a. | Term Loan Security Agreement |
| Sep 23, 2021 Reel 57594, frame 156 | W. R. Grace & Co.-Conn. | Wilmington Trust, National Association | Notes Security Agreement |
| Feb 17, 2023 Reel 62792, frame 510 | W.R. Grace & Co.-Conn. | Wilmington Trust, National Association | Security Interest |
| Aug 19, 2025 Reel 72520, frame 653 | W. R. Grace & Co.-Conn. | Wilmington Trust, National Association, as Notes Collateral Agent | Security Agreement (NOTES) |
| Jan 29, 2026 Reel 74532, frame 229 | W. R. Grace & Co.-Conn.; Advanced Refining Technologies LLC | Wilmington Trust, National Association, as Notes Collateral Agent | Notes Security Interest |
| Feb 2, 2026 Reel 74612, frame 972 | Wilmington Trust, National Association | W. R. Grace & Co.-Conn. | Release of Security Interest Recorded at Reel/Frame 057594/0156 |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Jun 2033
Term ends Jun 20, 2033. Maintenance fees still fall due before then
Note
The 548 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
16
later US patents cite this one
That is top 25% of utility patents granted in 2019 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.