Patent US3476358A successfully refreshed from Google Patents.
US3476358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve
Assignee: Koehring Co
•
Filing: 1966-09-29
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Granted: 1969-11-04
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Expires: 1986-09-29
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Westerlund
- 👤 Robert E Westerlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:15
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/04; F16K3/00; F16K3/02; F16K3/0254
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2797758A
Cited
US3032069A
Cited
US3195907A
Cited
US3205906A
Cited
US3302661A
Cited
US3261613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |