Patent US2730083A successfully refreshed from Google Patents.
US2730083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger for varying the lubricating oil temperature in internal-combustion engines
Assignee: Individual
•
Filing: 1953-07-31
•
Granted: 1956-01-10
•
Expires: 1973-07-31
Abstract
No abstract record available.
Inventors
- 👤 Kremser Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:16
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/08; F01M; F01M5/00; F01M5/002; F01P5/00; F01P5/10; F28; F28D; F28D7/00; F28D7/02; F28D7/026; F28D7/10; F28D7/12; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |