US3425477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heat recovery in evaporating and burning spent liquor
Assignee: MARATHON ENG Inc
•
Filing: 1966-09-28
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Granted: 1969-02-04
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Expires: 1986-09-28
Abstract
No abstract record available.
Inventors
- 👤 William G Farin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/10; D21C11/103; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S159/00; Y10S159/03
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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |