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US2699323A
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US
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Automotive heater
Assignee: Bergstrom Manufacturing Co
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Filing: 1951-06-08
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Granted: 1955-01-11
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Expires: 1971-06-08
Abstract
No abstract record available.
Inventors
- 👤 Adolph G Bergstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:57
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00357; B60H1/00371; B60H1/00007; B60H1/00207; B60H2001/00221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2331691A
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US1704971A
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US1990468A
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US2322041A
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US2242337A
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US2326242A
Cited
US2274033A
Cited
GB521507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |