US3523857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm assembly
Assignee: Chemical Rubber Products Inc
•
Filing: 1967-04-21
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Granted: 1970-08-11
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Expires: 1987-04-21
Abstract
No abstract record available.
Inventors
- 👤 Howard C Crosland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:37
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/02; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T428/00; Y10T428/21; Y10T428/215; Y10T428/24; Y10T428/24479; Y10T428/24488; Y10T428/24628; Y10T428/31504; Y10T428/3167; Y10T442/00; Y10T442/20; Y10T442/2369
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1914600A
Cited
US2250674A
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US2270259A
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US2638930A
Cited
US2642090A
Cited
US2697057A
Cited
GB793707A
Cited
US3032462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |