US2925775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well casing perforator
Assignee: Borg Warner Corp
•
Filing: 1955-12-13
•
Granted: 1960-02-23
•
Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Donovan S Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:10
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117; F; F42; F42D; F42D1/00; F42D1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1322083A
Cited
US2265982A
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US2617326A
Cited
US2452072A
Cited
US2530833A
Cited
US2494256A
Cited
US2662474A
Cited
US2629325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |