Patent US2492075A successfully refreshed from Google Patents.
US2492075A
Expired / Lapsed
US
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Vacuum pump
Assignee: Kinney Manufacturing Co
•
Filing: 1945-10-30
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Granted: 1949-12-20
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Expires: 1965-10-30
Abstract
No abstract record available.
Inventors
- 👤 Chester M Van Atta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:23
CPC Classifications
F; F04; F04C; F04C23/00; F04C23/005; F04C28/00; F04C28/06; F04C28/065; F04C25/00; F04C25/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2126553A
Cited
US1185944A
Cited
US1905583A
Cited
US1936935A
Cited
US1927799A
Cited
US1929198A
Cited
GB453608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |