US2768393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cutting a fine screw thread to function as a lead screw in producing another fine screw thread
Assignee: National Research Development Corp UK
•
Filing: 1952-05-09
•
Granted: 1956-10-30
•
Expires: 1972-05-09
Abstract
No abstract record available.
Inventors
- 👤 Sayce Leonard Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:45
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/24; B; B23; B23G; B23G1/00; B23G1/02; B23G7/00; B23Q; B23Q23/00; B23Q5/00; B23Q5/22; B23Q5/34; B23Q5/38; B23Q5/40; B23Q5/406; B44; B44B; B44B3/00; B44B3/006; B44B3/04; B44B2700/00; B44B2700/02; B44B2700/025; Y; Y10; Y10T; Y10T408/00; Y10T408/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US293930A
Cited
US1086806A
Cited
US1494464A
Cited
US1656592A
Cited
US1999816A
Cited
US2302105A
Cited
US2367562A
Cited
US2702393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |