US2717401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for cutting very fine screw threads
Assignee: Hilger and Watts Ltd
•
Filing: 1951-07-05
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Granted: 1955-09-13
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Expires: 1971-07-05
Abstract
No abstract record available.
Inventors
- 👤 Menzies Alexander Charl George
- 👤 Fensom George Edwin
- 👤 Zehden Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:44
CPC Classifications
B; B23; B23G; B23G7/00; B44; B44B; B44B3/00; B44B3/04; B44B2700/00; B44B2700/02; B44B2700/025; Y; Y10; Y10T; Y10T82/00; Y10T82/25
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) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |