Patent US2146157A successfully refreshed from Google Patents.
US2146157A
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Tracer controlled feed mechanism
Assignee: Individual
•
Filing: 1937-02-23
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Granted: 1939-02-07
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Expires: 1957-02-23
Abstract
No abstract record available.
Inventors
- 👤 Charles K Salisbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:19
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q2735/00; B23Q2735/02; B23Q2735/06; B23Q2735/062; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/303416; Y10T409/303472; Y10T409/303528; Y10T82/00; Y10T82/14; Y10T82/141; Y10T82/143; Y10T82/25; Y10T82/2552; Y10T82/2554; Y10T82/2556; Y10T82/2558
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-02-06 | 1942-08-08 | 1943-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-06 | 1946-08-08 | 1947-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-06 | 1950-08-08 | 1951-02-07 | $7700.00 | Window Closed / Lapsed |