Term ended Nov 7, 2020 · Medium confidence
20-year base term ended Sep 26, 2020
USPTO later recorded it as expired for non-payment on Sep 26, 2022.
Held by Snowflake Inc.
Filed Oct 21, 2005 as application 11/256,440 · Granted Aug 24, 2010
Base term plus 42 days of patent term adjustment (USPTO delay)
Today
Term ended Nov 7, 2020
2000
2026
Clock starts
Sep 26, 2000
Sep 26, 2000
Term ended
Nov 7, 2020
Nov 7, 2020
Granted
Aug 24, 2010
Aug 24, 2010
base term
patent term adjustment
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
42
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,386,450, to Nov 7, 2020. The term already ends on or before that date, so the cap shortened nothing.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
3
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 42 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. Confidence: Medium. 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 Sep 26, 2000, when application 09/669,556, the earliest non-provisional in its chain, was filed (this one was filed Oct 21, 2005); a parent in its chain could not be resolved (the next row) | Sep 26, 2020 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +42 days, USPTO patent term adjustment record | Nov 7, 2020 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,386,450) | resolves to Nov 7, 2020, no earlier than this term, so no change | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Sep 26, 2022, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Nov 7, 2020 | Medium confidence |
This family
| US 8,386,450 | Term ended no later than Nov 2026 | no later than Nov 2026 |
| US 7,783,625 | this patent Nov 2020 | Nov 2020 |
2 of 3 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 |
|---|---|---|---|
| Oct 21, 2005 Reel 17122, frame 950 | Simmen, David E. | International Business Machines Corporation | Assignment of Assignor's Interest |
| Jan 12, 2017 Reel 40952, frame 270 | International Business Machines Corporation | Red Hat, Inc. | Assignment of Assignor's Interest |
| Apr 1, 2020 Reel 52280, frame 79 | Red Hat, Inc. | International Business Machines Corporation | Assignment of Assignor's Interest |
| Apr 29, 2020 Reel 52527, frame 216 | International Business Machines Corporation | Snowflake Inc. | Assignment of Assignor's Interest |
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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 42 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,386,450, ends no earlier than this term, so it caps nothing.
Citations
19
later US patents cite this one
That is above the median of utility patents granted in 2010 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.