US3450412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well swab cup
Assignee: Individual
•
Filing: 1967-03-20
•
Granted: 1969-06-17
•
Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 Charles Haskell Collett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:24
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1548580A
Cited
US1563164A
Cited
US1767936A
Cited
US2358908A
Cited
US2336090A
Cited
US2581981A
Cited
US2852323A
Cited
US2887347A
Cited
US3152809A
Cited
US3094904A
Cited
US3346267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |