US3549503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the distillation of distilland displaced by distillate
Assignee: Individual
•
Filing: 1968-10-09
•
Granted: 1970-12-22
•
Expires: 1988-10-09
Abstract
No abstract record available.
Inventors
- 👤 Harold R Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:46
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/14; C02F1/16; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/208; Y02A20/212; Y10; Y10S; Y10S203/00; Y10S203/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190728130A
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US1204716A
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US2520186A
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US2405877A
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US2490659A
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US2772543A
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US2918219A
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US3190816A
Cited
US3167488A
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US3233779A
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US3174915A
Cited
US3314862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |