Patent US2821091A successfully refreshed from Google Patents.
US2821091A
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Auxiliary control for internal combustion engines
Assignee: Caterpillar Inc
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Filing: 1954-08-20
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Granted: 1958-01-28
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Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
- 👤 Paul B Benner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
F; F02; F02D; F02D1/00; F02D1/02; F02D1/08; F02D1/10; B; B60; B60K; B60K26/00; B60K26/02; F02D11/00; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18064; Y10T74/20; Y10T74/20207; Y10T74/20213; Y10T74/2022; Y10T74/20226; Y10T74/20528; Y10T74/20534; Y10T74/20576; Y10T74/20888; Y10T74/21; Y10T74/2142; Y10T74/2144; Y10T74/2146; Y10T74/2154; Y10T74/2158
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |