US3034731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back flow preventing valve assembly
Assignee: Chapin Manufacturing Inc
•
Filing: 1959-03-04
•
Granted: 1962-05-15
•
Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Chapin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:00
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/24; B05B7/26; B05B7/28; B05B7/30; B05B7/2402; B05B7/244; B05B7/2443; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; F16K15/1471; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3222; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1222316A
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US2322631A
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US2449573A
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US2412760A
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US2594318A
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US2662724A
Cited
US2675823A
Cited
US2738798A
Cited
US2897835A
Cited
US2875776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |