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US2727455A
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US
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Method and apparatus for air conditioning and ventilating systems
Assignee: JOHN J NESBITT Inc
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Filing: 1953-04-14
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Granted: 1955-12-20
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Expires: 1973-04-14
Abstract
No abstract record available.
Inventors
- 👤 Samuel W Miller
- 👤 John W Mcelgin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:25
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/028; F24F1/0284; F24F1/03; F24F1/0314; F24F1/0328
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2211568A
Cited
US2224312A
Cited
US2235500A
Cited
US2282946A
Cited
US2324858A
Cited
US2632375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |