Patent US712569A successfully refreshed from Google Patents.
US3487435A
Expired / Lapsed
US
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Control valves for fluids
Assignee: Individual
•
Filing: 1968-04-08
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Granted: 1969-12-30
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Expires: 1988-04-08
Abstract
No abstract record available.
Inventors
- 👤 John Maxwell Sheardown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:22
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/078; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7668; Y10T137/8593; Y10T137/86493; Y10T137/86558; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1312239A
Cited
US2707374A
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US2747611A
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GB855541A
Cited
US2940465A
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US2870764A
Cited
US2988100A
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US3138175A
Cited
US3109442A
Cited
US3289688A
Cited
US3330294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |