US3456533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tools
Assignee: National Research Development Corp UK
•
Filing: 1966-08-03
•
Granted: 1969-07-22
•
Expires: 1986-08-03
Abstract
No abstract record available.
Inventors
- 👤 Donald Firth
- 👤 Sinclair Cunningham
- 👤 Hugh Hair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:56
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23B; B23B3/00; B23B3/06; B23Q1/00; B23Q1/0009; B23Q1/0018; B23Q1/25; B23Q1/44; B23Q1/48; B23Q5/00; B23Q2705/00; B23Q2705/005; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10T; Y10T82/00; Y10T82/25
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US222901A
Cited
US1582639A
Cited
US2091700A
Cited
US2352753A
Cited
US2312354A
Cited
GB721744A
Cited
DE958798C
Cited
DE1112871B
Cited
US3030744A
Cited
US3141365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |