Patent US2254738A successfully refreshed from Google Patents.
US2935320A
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US
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Inflatable valved article
Assignee: Barr Rubber Products Co
•
Filing: 1954-05-12
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Granted: 1960-05-03
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Expires: 1974-05-12
Abstract
No abstract record available.
Inventors
- 👤 John C Chupa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:43
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/20; F16K15/202; Y; Y10; Y10S; Y10S273/00; Y10S273/05; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/613; Y10T137/614
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR1077816A
Cited
US2730765A
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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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |