US2635852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact drill
Assignee: SNYDER OIL TOOL Corp
•
Filing: 1946-12-05
•
Granted: 1953-04-21
•
Expires: 1966-12-05
Abstract
No abstract record available.
Inventors
- 👤 Robert E Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:35
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US460369A
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US466660A
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US1607082A
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US1348815A
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US1462975A
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US1526748A
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US2246418A
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US2352412A
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US2287157A
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US2376974A
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US2425012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |