US3412971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically-controlled valve apparatus and control circuit suitable for use therein
Assignee: Armstrong World Industries Inc
•
Filing: 1966-03-03
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Granted: 1968-11-26
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Expires: 1986-03-03
Abstract
No abstract record available.
Inventors
- 👤 David T Mcdivitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:10
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0675; F16K31/0679; B; B05; B05B; B05B12/00; B05B12/08; B05B12/12; B05C; B05C5/00; B05C5/02; B05C5/0208; B05C5/0212; B05C5/0216; B05C5/0225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2619116A
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US2778978A
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US2901210A
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US3047742A
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US3182222A
Cited
US3213323A
Cited
US3247912A
Cited
US3213321A
Cited
US3295421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |