US2970824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifiers
Assignee: Individual
•
Filing: 1957-02-11
•
Granted: 1961-02-07
•
Expires: 1977-02-11
Abstract
No abstract record available.
Inventors
- 👤 Abraham I Caplow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:03
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1899504A
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US1966872A
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US1976401A
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US2076192A
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US2105887A
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US2163474A
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US2210354A
Cited
GB594155A
Cited
US2588736A
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US2774655A
Cited
US2796145A
Cited
US2780078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |