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US2643555A
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Self-contained power unit
Assignee: DUMORE CO
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Filing: 1950-01-12
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Granted: 1953-06-30
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Expires: 1970-01-12
Abstract
No abstract record available.
Inventors
- 👤 James P Steibel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:17
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; B23Q5/261; F; F15; F15B; F15B15/00; F15B15/18; Y; Y10; Y10S; Y10S60/00; Y10S60/911; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6757
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |