US2603294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well packer
Assignee: LANE WELIS Co
•
Filing: 1945-12-21
•
Granted: 1952-07-15
•
Expires: 1965-12-21
Abstract
No abstract record available.
Inventors
- 👤 Charles H Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:27
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; E21B33/1216; E21B33/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1992933A
Cited
US2005955A
Cited
US2058103A
Cited
US2204648A
Cited
US2241532A
Cited
US2241561A
Cited
US2295770A
Cited
US2368928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |