US2765853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well packer
Assignee: Individual
•
Filing: 1952-04-07
•
Granted: 1956-10-09
•
Expires: 1972-04-07
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:41
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1291; E21B33/1292; E21B33/1295; E21B33/12955
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US625648A
Cited
US2159640A
Cited
US2379394A
Cited
US2389985A
Cited
US2578900A
Cited
US2467801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |