Patent US2790646A successfully refreshed from Google Patents.
US2790646A
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Flexible drive multiple chuck heads
Assignee: Individual
•
Filing: 1954-09-24
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Granted: 1957-04-30
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Expires: 1974-09-24
Abstract
No abstract record available.
Inventors
- 👤 Melvin H Emrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:52
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/16; B23B31/16004; B23B31/16037; Y; Y10; Y10S; Y10S464/00; Y10S464/901; Y10T; Y10T279/00; Y10T279/35; Y10T408/00; Y10T408/36; Y10T408/38; Y10T408/3822; Y10T408/65; Y10T408/665
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) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |