Patent US2535772A successfully refreshed from Google Patents.
US2535772A
Expired / Lapsed
US
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Humidifier
Assignee: Individual
•
Filing: 1946-03-04
•
Granted: 1950-12-26
•
Expires: 1966-03-04
Abstract
No abstract record available.
Inventors
- 👤 William J Woolley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:08
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/008; F24D19/0082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US750582A
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US903250A
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US1132009A
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US1229434A
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US1365284A
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US1981365A
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US2073915A
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US2112211A
Cited
US2111437A
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US2395512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |