Patent US3456533A successfully refreshed from Google Patents.
US3456533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tools
Assignee: National Research Development Corp UK
•
Filing: 1966-08-03
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Granted: 1969-07-22
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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 17:55
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
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References Cited (Backward Citations)
US222901A
Cited
US1582639A
Cited
US2091700A
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US2352753A
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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 |