US3431899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for delivering supplementary air to the fuel-air mixture in four-stroke-cycle engines
Assignee: Merkurium AG
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Filing: 1966-08-26
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Granted: 1969-03-11
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Expires: 1986-08-26
Abstract
No abstract record available.
Inventors
- 👤 Alfred Neidhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:04
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/225; G01L1/2262; F; F02; F02D; F02D41/00; F02D41/30; F02M; F02M1/00; F02M23/00; F02M23/04; F02M23/06; F02M29/00; F02M29/04; G01L1/2206; G01L1/2218; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4392; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |