Patent US2769339A successfully refreshed from Google Patents.
US2769339A
Expired / Lapsed
US
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Relative humidity indicating and recording apparatus
Assignee: Individual
•
Filing: 1953-04-24
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Granted: 1956-11-06
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Expires: 1973-04-24
Abstract
No abstract record available.
Inventors
- 👤 Harrison D Brailsford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:55
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/56; G01N25/66; G01N25/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1883116A
Cited
US2371511A
Cited
US2566307A
Cited
US2449283A
Cited
US2662393A
Cited
US2715836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |