Patent US4779755A successfully refreshed from Google Patents.
Patent US3022383A successfully refreshed from Google Patents.
US2597409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internally fired perforating gun
Assignee: Mccullough Tool Co
•
Filing: 1946-09-20
•
Granted: 1952-05-20
•
Expires: 1966-09-20
Abstract
No abstract record available.
Inventors
- 👤 James O Tow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:13
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1376530A
Cited
US1582184A
Cited
US2257276A
Cited
US2218802A
Cited
US2407081A
Cited
US2433231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |