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US2678663A
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US
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Diaphragm anchoring means and sealing gasket therefor
Assignee: HYDRO FORM CORP
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Filing: 1951-04-12
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Granted: 1954-05-18
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Expires: 1971-04-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Chyba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:13
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US116669A
Cited
US1904250A
Cited
US2100462A
Cited
US2229057A
Cited
US2204507A
Cited
US2446694A
Cited
US2550672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |