Patent US2667567A successfully refreshed from Google Patents.
US2667567A
Expired / Lapsed
US
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Art of heating devices
Assignee: American Aerovap Inc
•
Filing: 1951-03-27
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Granted: 1954-01-26
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Expires: 1971-03-27
Abstract
No abstract record available.
Inventors
- 👤 Buehlier Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:53
CPC Classifications
A; A01; A01M; A01M1/00; A01M1/20; A01M1/2022; A01M1/2061; A01M1/2077
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1680621A
Cited
US1404317A
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US2155930A
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US2311164A
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US2502764A
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US2540095A
Cited
US2541637A
Cited
US2616024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |