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Patent US2684204A successfully refreshed from Google Patents.
US2684204A
Expired / Lapsed
US
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Vehicle fresh-air heating system
Assignee: Old Carco LLC
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Filing: 1950-03-04
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Granted: 1954-07-20
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Expires: 1970-03-04
Abstract
No abstract record available.
Inventors
- 👤 Ernest P Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:49
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10091; F02M35/10137; B; B60; B60H; B60H1/00; F02M35/10242; F02M35/10255; F02M35/10268; F02M35/16; F02M35/161; F02M35/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |