Patent US2774380A successfully refreshed from Google Patents.
US2774380A
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Diaphragm annulus with a spring therein
Assignee: Tokheim Corp
•
Filing: 1952-04-28
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Granted: 1956-12-18
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Expires: 1972-04-28
Abstract
No abstract record available.
Inventors
- 👤 William L Hudson
- 👤 Lee Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:38
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/12; F16K7/14; F16K7/16; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/02; F04B43/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US356997A
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US846455A
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US1630292A
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US2258009A
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US2260205A
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US2473948A
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US2658526A
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US2520771A
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US2685304A
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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) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |