US2956559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel economizer for internal combustion engines
Assignee: Individual
•
Filing: 1958-11-03
•
Granted: 1960-10-18
•
Expires: 1978-11-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur O Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:07
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/16; F02M31/18; F02M26/00; F02M26/13; F02M26/14; F02M26/15; F02M26/36; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1961444A
Cited
US2147670A
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US2147671A
Cited
US2300774A
Cited
US2349676A
Cited
US2349675A
Cited
US2430852A
Cited
US2715392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |