US2711683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venting systems
Assignee: Stewart Warner Corp
•
Filing: 1952-08-12
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Granted: 1955-06-28
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Expires: 1972-08-12
Abstract
No abstract record available.
Inventors
- 👤 Frank A Ryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:19
CPC Classifications
F; F23; F23L; F23L17/00; F23L17/02; F23L17/04; F23J; F23J13/00; F23J13/02; F23J13/025; F23L15/00; F23L15/04; F23J2211/00; F23J2211/10; F23J2211/101; Y; Y02; Y02E; Y02E20/00; Y02E20/34
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) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |