US3453053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus for detecting changes in the quality of a medium
Assignee: Leesona Corp
•
Filing: 1965-03-17
•
Granted: 1969-07-01
•
Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 Charles Gunn-Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:19
CPC Classifications
B; B65; B65H; B65H63/00; B65H63/06; B65H63/062; B65H63/065; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2654288A
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US2699701A
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US2901630A
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US3185924A
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US3111555A
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US3138759A
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US3264922A
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US3275744A
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US3257559A
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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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |