US2636561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well gun
Assignee: Individual
•
Filing: 1948-01-24
•
Granted: 1953-04-28
•
Expires: 1968-01-24
Abstract
No abstract record available.
Inventors
- 👤 Harry W Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:30
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2200487A
Cited
US2210192A
Cited
US2250056A
Cited
US2349666A
Cited
US2327362A
Cited
US2327340A
Cited
US2299210A
Cited
US2351179A
Cited
US2402153A
Cited
US2436118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |