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US3548660A
Expired / Lapsed
US
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Humidity-sensing closure for a container
Assignee: HYGRODYNAMICS Inc A CORP OF
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Filing: 1968-08-01
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Granted: 1970-12-22
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Expires: 1988-08-01
Abstract
No abstract record available.
Inventors
- 👤 Leopold Perlaky
- 👤 Carlton E Ohlheiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:20
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/048; F; F02; F02K; F02K9/00; F02K9/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2713625A
Cited
US2849149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |