Patent US2718840A successfully refreshed from Google Patents.
US2718840A
Expired / Lapsed
US
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Air conditioning system
Assignee: BUENSOD STACEY Inc
•
Filing: 1951-08-04
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Granted: 1955-09-27
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Expires: 1971-08-04
Abstract
No abstract record available.
Inventors
- 👤 Lyman Samuel Edson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:48
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/048; F24F3/052; F24F3/0522; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1819; Y10T137/1834; Y10T137/8593; Y10T137/86493; Y10T137/86879; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US76717A
Cited
US186051A
Cited
US1435361A
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US699352A
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US1417592A
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US1668128A
Cited
US1783005A
Cited
US2310941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |