US2539921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool actuating unit
Assignee: Individual
•
Filing: 1947-06-07
•
Granted: 1951-01-30
•
Expires: 1967-06-07
Abstract
No abstract record available.
Inventors
- 👤 Walter J Neisingh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:38
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/08; F16H25/12; B; B23; B23D; B23D51/00; B23D51/16; B23D57/00; B23D57/0076; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US478793A
Cited
US1134047A
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US1233858A
Cited
US1622159A
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US1813286A
Cited
US1866529A
Cited
US1985901A
Cited
US2121831A
Cited
GB574400A
Cited
US2361821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |