US3176770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforator initiating device
Assignee: Camco Inc
•
Filing: 1962-09-28
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Granted: 1965-04-06
•
Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 Ehlert Harry Cern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:25
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/112; E21B43/116; E21B43/1185; E21B43/119; E21B47/00; E21B47/09; E21B47/092
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2426106A
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US2544601A
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US2594654A
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US3105547A
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US3105546A
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US3105548A
Cited
US3105549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |