Patent US2505286A successfully refreshed from Google Patents.
US2505286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor heater
Assignee: Individual
•
Filing: 1946-07-19
•
Granted: 1950-04-25
•
Expires: 1966-07-19
Abstract
No abstract record available.
Inventors
- 👤 Gratsinger Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:02
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1455246A
Cited
US1505179A
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US1632658A
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US1759969A
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US1710391A
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US1727959A
Cited
US1837000A
Cited
US2201703A
Cited
US2192655A
Cited
US2217595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |