US2498029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1945-12-13
•
Granted: 1950-02-21
•
Expires: 1965-12-13
Abstract
No abstract record available.
Inventors
- 👤 Leonard F Clerc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:30
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/352; F04C18/00; F04C18/30; F04C18/34; F04C18/344; F04C18/3446; Y; Y10; Y10S; Y10S100/00; Y10S100/903; Y10S100/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US40008A
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US105318A
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US601916A
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US1016017A
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US1058108A
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GB110751A
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GB257631A
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US1635006A
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US2150528A
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GB480522A
Cited
FR833106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |