US2889774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gun perforator
Assignee: Jersey Production Research Co
•
Filing: 1957-01-18
•
Granted: 1959-06-09
•
Expires: 1977-01-18
Abstract
No abstract record available.
Inventors
- 👤 Thomas O Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:11
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733657A
Cited
US2344778A
Cited
US2616370A
Cited
US2657576A
Cited
US2708408A
Cited
US2756677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |