Patent US1775939A successfully refreshed from Google Patents.
US1775939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automobile heater
Assignee: Individual
•
Filing: 1927-01-28
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Granted: 1930-09-16
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Expires: 1947-01-28
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Matthaei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:21
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/10; F28D7/103; B; B60; B60H; B60H1/00; B60H1/00321; B60H1/00335; F01; F01N; F01N5/00; F01N5/02; F28F; F28F1/00; F28F1/08; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0008; F28F2265/00; F28F2265/26; F28F2275/00; F28F2275/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-09-15 | 1934-03-17 | 1934-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-09-15 | 1938-03-17 | 1938-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-09-15 | 1942-03-17 | 1942-09-16 | $7700.00 | Window Closed / Lapsed |