US2587980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill
Assignee: NAT TOOL SALVAGE Co
•
Filing: 1947-04-14
•
Granted: 1952-03-04
•
Expires: 1967-04-14
Abstract
No abstract record available.
Inventors
- 👤 Ervin C Doepker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:27
CPC Classifications
B; B23; B23B; B23B51/00; B23B2251/00; B23B2251/14; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/899; Y10T408/909; Y10T408/9093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US546041A
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US796321A
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US984323A
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US1069930A
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US1847302A
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FR714611A
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US2334089A
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US2260288A
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FR873752A
Cited
US2354985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |