US2860122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyvinyl butyral
Assignee: Celanese Corp
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Filing: 1954-12-09
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Granted: 1958-11-11
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Expires: 1974-12-09
Abstract
No abstract record available.
Inventors
- 👤 Berardinelli Frank
- 👤 Richard E Davies
- 👤 Blanche B White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:44
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN THE PROCESS OF THE PRODUCTION OF A POLYVINYL ACETAL IN WHICH AN ALDEHYDE IS REACTED IN THE PRESENCE OF SULFURIC ACID WITH A POLYVINYL RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOLS AND POLYVINYL ESTERS WHIICH IS REACTIVE WITH SAID ALDEHYDE TO PRODUCE A POLYVINYL ACETAL AND IN WHICH AS A RESULT OF SAID REACTION AN ACIDIC SOLUTION OF THE POLYVINYL ACETAL IS PRODUCED, THE IMPROVEMENT WHICH COMPRISES NEUTRALIIZING SAID SOLUTION WITH MAGNESIUM ACETATE.
Claim 2
Dependent Claim
76 words
IN THE PROCESS OF THE PRODUCTION OF A POLYVINYL ACETAL IN WHICH AN ALDEHYDE IS REACTED IN THE PRESENCE OF SULFURIC ACID WITH A POLYVINYL RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOLS AND POLYVINYL ESTERS WHIICH IS REACTIVE WITH SAID ALDEHYDE TO PRODUCE A POLYVINYL ACETAL AND IN WHICH AS A RESULT OF SAID REACTION AN ACIDIC SOLUTION OF THE POLYVINYL ACETAL IS PRODUCED, THE IMPROVEMENT WHICH COMPRISES NEUTRALIIZING SAID SOLUTION WITH MAGNESIUM ACETATE.
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) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |