US3469818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced shutoff valve
Assignee: Bobrick Corp
•
Filing: 1966-11-14
•
Granted: 1969-09-30
•
Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Arnold A Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:42
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0644; F16K31/0668; F16K31/0655; F16K31/0658
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA500861A
Cited
US1296746A
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US2750962A
Cited
US2835468A
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US3183926A
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US3215157A
Cited
US3223380A
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US3301523A
Cited
US3353784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |