Patent US3412552A successfully refreshed from Google Patents.
US3412552A
Expired / Lapsed
US
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Internal cooling for a 4-cycle internal combustion engine cylinder
Assignee: Elsbett Konstruktion
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Filing: 1966-09-21
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Granted: 1968-11-26
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Expires: 1986-09-21
Abstract
No abstract record available.
Inventors
- 👤 Elsbett Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:51
CPC Classifications
F; F02; F02B; F02B31/00; F01; F01P; F01P1/00; F01P1/02; F02B17/00; F02B29/00; F02B31/08; F02B31/085; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/28; F02F1/30; F02F1/32; F02G; F02G5/00; F02G5/02; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B3/00; F02B3/06; 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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |