US2807145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for supplying heat for hot gas defrosting systems
Assignee: Individual
•
Filing: 1953-12-10
•
Granted: 1957-09-24
•
Expires: 1973-12-10
Abstract
No abstract record available.
Inventors
- 👤 Ray M Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:05
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B47/00; F25B47/02; F25B47/022; F25B47/025; Y; Y10; Y10S; Y10S62/00; Y10S62/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US697029A
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US1148464A
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US2309165A
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US2333296A
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US2432547A
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US2513373A
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US2525560A
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US2635433A
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US2637983A
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US2564310A
Cited
US2645101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |