US2632475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm assembly
Assignee: Perfex Corp
•
Filing: 1946-06-06
•
Granted: 1953-03-24
•
Expires: 1966-06-06
Abstract
No abstract record available.
Inventors
- 👤 Elo Arpad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:15
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1527102A
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US1921312A
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US2150771A
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US2177674A
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US2296435A
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US2331464A
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US2435716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |