Patent US2765742A successfully refreshed from Google Patents.
US2765742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum pump
Assignee: Individual
•
Filing: 1951-03-01
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Granted: 1956-10-09
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Expires: 1971-03-01
Abstract
No abstract record available.
Inventors
- 👤 Clifford C King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:55
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1066; F04B39/0005; F04B39/1073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US568433A
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USRE23067E
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AT11825B
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US1017722A
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US1040980A
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US1402222A
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US1417105A
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US1456719A
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US1679132A
Cited
US1504490A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |