US2666978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic power file
Assignee: WILLIAM K MARCH
•
Filing: 1949-12-27
•
Granted: 1954-01-26
•
Expires: 1969-12-27
Abstract
No abstract record available.
Inventors
- 👤 Claude T Skillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:55
CPC Classifications
B; B23; B23D; B23D67/00; Y; Y10; Y10T; Y10T29/00; Y10T29/44; Y10T29/446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305283A
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US747766A
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US1000159A
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US984112A
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US1136796A
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US1276167A
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US1631743A
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US2102782A
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US2182289A
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US2068201A
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US2127176A
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US2120300A
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US2224132A
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US2214189A
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US2255395A
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US2446011A
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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) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |