Patent US2497028A successfully refreshed from Google Patents.
US2497028A
Expired / Lapsed
US
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Air conditioning apparatus
Assignee: ADVANCE MANUFACTURING Inc
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Filing: 1946-06-03
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Granted: 1950-02-07
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Expires: 1966-06-03
Abstract
No abstract record available.
Inventors
- 👤 Henry O Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:07
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00642; B60H1/00814; B60H1/00878; B60H1/00899; B60H1/00921; B64; B64D; B64D13/00; B64D13/06; B64D13/08; B60H2001/00949; Y; Y02; Y02T; Y02T50/00; Y02T50/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2069201A
Cited
US2318858A
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US2341781A
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US2384210A
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US2344215A
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US2443500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |