US2771247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant humidity apparatus
Assignee: Food Technology Inc
•
Filing: 1952-04-04
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Granted: 1956-11-20
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Expires: 1972-04-04
Abstract
No abstract record available.
Inventors
- 👤 Henry L Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:31
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F25; F25D; F25D17/00; F25D17/04; F25D17/042; F25D2317/00; F25D2317/04; F25D2317/041; F25D2317/0413; F25D2317/04131
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190424033A
Cited
US2026801A
Cited
US1860377A
Cited
US2002294A
Cited
GB465357A
Cited
GB602402A
Cited
US2602589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |