Patent US3448959A successfully refreshed from Google Patents.
US3448959A
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Valve construction having rolling diaphragm actuator means therefor
Assignee: Robertshaw Controls Co
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Filing: 1966-08-29
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Granted: 1969-06-10
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Expires: 1986-08-29
Abstract
No abstract record available.
Inventors
- 👤 William L Mchale
- 👤 Svend E Sorensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:06
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F16; F16K; F16K31/00; F16K31/12; F16K31/122; F16K31/1225; F16K31/16; F16K31/165; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86726
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2340489A
Cited
US2828767A
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US3014493A
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US2974682A
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US3056574A
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US3191627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |