US2654385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic hygroscopic type air vent
Assignee: TACO HEATERS Inc
•
Filing: 1949-03-10
•
Granted: 1953-10-06
•
Expires: 1969-03-10
Abstract
No abstract record available.
Inventors
- 👤 Jr William M Grosvenor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:12
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/082; F24D19/083; F24D19/085; F24D19/087; F16; F16K; F16K31/00; F16K31/001; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1326647A
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US1162170A
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US1575247A
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US1624774A
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US2042462A
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US2153726A
Cited
US2331431A
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US2467217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |