Patent US3080210A successfully refreshed from Google Patents.
Patent US2856760A successfully refreshed from Google Patents.
US2856760A
Expired / Lapsed
US
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Refrigeration apparatus for air cooling systems and the like
Assignee: Individual
•
Filing: 1955-11-07
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Granted: 1958-10-21
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Expires: 1975-11-07
Abstract
No abstract record available.
Inventors
- 👤 Leo N Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:24
CPC Classifications
F; F24; F24F; F24F5/00; F24F5/0007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US879346A
Cited
US1639051A
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US1854619A
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US2071188A
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US2365791A
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US2561506A
Cited
US2532328A
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US2610485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |