US2667031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust auxiliary for internalcombustion engines
Assignee: Individual
•
Filing: 1950-12-21
•
Granted: 1954-01-26
•
Expires: 1970-12-21
Abstract
No abstract record available.
Inventors
- 👤 Ryder William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:09
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/082; F02; F02B; F02B35/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US799013A
Cited
US1244442A
Cited
US1282590A
Cited
DE350715C
Cited
US2211795A
Cited
CH224116A
Cited
US2308059A
Cited
US2389059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |