US3520327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Station selector valve
Assignee: Ross Operating Valve Co
•
Filing: 1968-05-28
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Granted: 1970-07-14
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Expires: 1988-05-28
Abstract
No abstract record available.
Inventors
- 👤 David R Claydon
- 👤 Daniel B Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:34
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/072; F16K11/074; F16K11/0743; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8292; Y10T137/8309; Y10T137/8593; Y10T137/86493; Y10T137/86501; Y10T137/86574; Y10T137/8667; Y10T137/86678; Y10T137/87056; Y10T137/87088; Y10T137/87169; Y10T137/87233; Y10T137/87241; Y10T137/87917; Y10T137/88022; Y10T137/8803
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3080570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |