Patent US2712927A successfully refreshed from Google Patents.
US2712927A
Expired / Lapsed
US
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Air conditioning methods
Assignee: York Corp
•
Filing: 1949-11-25
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Granted: 1955-07-12
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Robert D Blum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:18
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/01; F24F3/00; F24F3/02; F24F3/04; F24F3/12; F24F3/14; Y; Y02; Y02B; Y02B30/00; Y02B30/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1935305A
Cited
US1995667A
Cited
US1955406A
Cited
US2144626A
Cited
US2159276A
Cited
US2256940A
Cited
US2342689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |