US3045748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for perforating wells
Assignee: Otis Engineering Corp
•
Filing: 1957-12-26
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Granted: 1962-07-24
•
Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 Harry B Schramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:58
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/02; E21B23/14; E21B43/00; E21B43/11; E21B43/119
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2741316A
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US2766828A
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US2859697A
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US2876843A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |