Patent US2835234A successfully refreshed from Google Patents.
US2835234A
Expired / Lapsed
US
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Device for improved cleaning and analysis of engine cooling systems
Assignee: Individual
•
Filing: 1955-05-06
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Granted: 1958-05-20
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Expires: 1975-05-06
Abstract
No abstract record available.
Inventors
- 👤 Carl H Rasch
- 👤 Swain Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:37
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/06; F01P2011/065; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87788; Y10T137/87829; Y10T137/87837; Y10T137/87861
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US103872A
Cited
US944611A
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US1619273A
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US1701824A
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US1891592A
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US2092257A
Cited
US2146930A
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US2264876A
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US2221803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |