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US3052610A
Expired / Lapsed
US
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Concentration of acetic acid
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1960-05-19
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Granted: 1962-09-04
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Expires: 1980-05-19
Abstract
No abstract record available.
Inventors
- 👤 Akaboshi Michijiro
- 👤 Uragami Kikuji
- 👤 Okuma Kensuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:31
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/43; C07C51/44; C07C51/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS OF CONCENTRATING AN AQUEOUS SOLUTION OF ACETIC ACID WHICH COMPRISES MIXING SAID SOLUTION WITH LATION ZONE, RECOVERING VINYL ACETATE AND WATER FROM THE TOP OF SAID ZONE, AND RECOVERING CONCENTRATED ACETIC ACID FROM THE BOTTOM OF SAID ZONE, SEPARATING SAID VINYL ACETATE FROM THE WATER AND WITHDRAWING THE VINYL ACETATE FROM THE DISTILLATION SYSTEM.
Claim 2
Dependent Claim
56 words
A PROCESS OF CONCENTRATING AN AQUEOUS SOLUTION OF ACETIC ACID WHICH COMPRISES MIXING SAID SOLUTION WITH LATION ZONE, RECOVERING VINYL ACETATE AND WATER FROM THE TOP OF SAID ZONE, AND RECOVERING CONCENTRATED ACETIC ACID FROM THE BOTTOM OF SAID ZONE, SEPARATING SAID VINYL ACETATE FROM THE WATER AND WITHDRAWING THE VINYL ACETATE FROM THE DISTILLATION SYSTEM.
References Cited (Backward Citations)
US2333756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |