US3431179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distilland by-pass means multi-stage evaporators having
Assignee: Applied Research & Eng Ltd
•
Filing: 1966-12-15
•
Granted: 1969-03-04
•
Expires: 1986-12-15
Abstract
No abstract record available.
Inventors
- 👤 Roy Starmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:16
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/06; B01D3/065; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1145728A
Cited
US2388773A
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US2959524A
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US3122487A
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US3161558A
Cited
US3197387A
Cited
US3312601A
Cited
US3172824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |