Patent US3468339A successfully refreshed from Google Patents.
US3468339A
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US
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Pneumatically operated mixing valve
Assignee: Robertshaw Controls Co
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Filing: 1967-03-03
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Granted: 1969-09-23
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Expires: 1987-03-03
Abstract
No abstract record available.
Inventors
- 👤 Robert A Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:06
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; F16K31/1262; F16K11/00; F16K11/02; F16K11/022; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86815
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA588762A
Cited
CA629388A
Cited
US951161A
Cited
US2458230A
Cited
US3058431A
Cited
GB911030A
Cited
US3368787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |