US2565430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm chuck
Assignee: NA Woodworth Co
•
Filing: 1947-01-03
•
Granted: 1951-08-21
•
Expires: 1967-01-03
Abstract
No abstract record available.
Inventors
- 👤 Hohwart George
- 👤 Ernest F Hohwart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:03
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/025; B23B31/32; Y; Y10; Y10T; Y10T279/00; Y10T279/12; Y10T279/1224; Y10T279/1233; Y10T279/28; Y10T279/29; Y10T279/34; Y10T279/3493
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US400459A
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US926761A
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US1056954A
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US1036994A
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US1146193A
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US1565227A
Cited
US1844616A
Cited
US1858693A
Cited
US1881658A
Cited
US2443895A
Cited
US2394624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |