US2681572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relative humidity indicator
Assignee: Weston Electric Instrument Corp
•
Filing: 1950-07-05
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Granted: 1954-06-22
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Expires: 1970-07-05
Abstract
No abstract record available.
Inventors
- 👤 Anthony H Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:19
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/56; G01N25/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US834660A
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US1579706A
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US1892012A
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CH165881A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |