US2494256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for perforating well casings and well walls
Assignee: Gulf Research and Development Co
•
Filing: 1945-09-11
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Granted: 1950-01-10
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Expires: 1965-09-11
Abstract
No abstract record available.
Inventors
- 👤 Muskat Morris
- 👤 Floyd W Parker
- 👤 William L Kehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:27
CPC Classifications
C; C10; C10G; C10G61/00; C10G61/02; C10G61/06; E; E03; E03B; E03B3/00; E03B3/06; E03B3/08; E03B3/10; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117; F; F42; F42B; F42B3/00; F42B3/08; Y; Y02; Y02A; Y02A20/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2399211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |