Patent US2647657A successfully refreshed from Google Patents.
US2647657A
Expired / Lapsed
US
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Diaphragm for storage tanks
Assignee: Goodrich Corp
•
Filing: 1950-01-24
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Granted: 1953-08-04
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Expires: 1970-01-24
Abstract
No abstract record available.
Inventors
- 👤 Carroll P Krupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:20
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/22; B65D90/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1669183A
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US2142225A
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US2257941A
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US2387598A
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US2371632A
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US2378467A
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US2380866A
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US2578090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |