US3492980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pollution inhibiting means in the form of a fuel recirculating apparatus for an internal combustion engine
Assignee: HARRY A BRADSHAW
•
Filing: 1967-11-13
•
Granted: 1970-02-03
•
Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Paul R Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:22
CPC Classifications
F; F02; F02M; F02M26/00; F02M26/13; F02M26/35; F02M26/14; F02M26/15; Y; Y10; Y10S; Y10S55/00; Y10S55/14; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1640790A
Cited
US2051559A
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US2084142A
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US2325543A
Cited
US2446266A
Cited
US2584674A
Cited
US2954967A
Cited
US3262437A
Cited
US3304711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |