US3005809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl alcohol-crotonic acid copolymers
Assignee: Airco Inc
•
Filing: 1957-09-05
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Granted: 1961-10-24
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Expires: 1977-09-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur I Lowell
- 👤 Alio J Buselli
- 👤 William H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:23
CPC Classifications
C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08F; C08F8/00; C08F8/12; C08F8/44; C08J; C08J5/00; C08J5/18; C08F2800/00; C08F2800/10; C08F2810/00; C08F2810/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF FORMING VINYL ALCOHOL-CROTONIC ACID COPOLYMERS WHICH COMPRISES REACTING A VINYL ACETATECROTONIC ACID COPOLYMER WITH AN EXCESS OF A LOWER ALKANOL IN THE PRESENCE OF A BASE SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE, SODIUM METHYLATE AND POTASSIUM METHYLATE, THE AMOUNT OF SUCH BASE BEING AT LEAST SUFFICIENT TO SUBSTANTIALLY COMPLETELY NEUTRALIZE THE FREE CARBOXYL GROUPS AND TO CATALYZE THE ALCOHOLYSIS OF THE ACETYL GROUPS OF THE COPOLYMER.
Claim 2
Independent Claim
73 words
THE METHOD OF FORMING VINYL ALCOHOL-CROTONIC ACID COPOLYMERS WHICH COMPRISES REACTING A VINYL ACETATECROTONIC ACID COPOLYMER WITH AN EXCESS OF A LOWER ALKANOL IN THE PRESENCE OF A BASE SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE, SODIUM METHYLATE AND POTASSIUM METHYLATE, THE AMOUNT OF SUCH BASE BEING AT LEAST SUFFICIENT TO SUBSTANTIALLY COMPLETELY NEUTRALIZE THE FREE CARBOXYL GROUPS AND TO CATALYZE THE ALCOHOLYSIS OF THE ACETYL GROUPS OF THE COPOLYMER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-23 | 1965-04-24 | 1965-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-23 | 1969-04-24 | 1969-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-23 | 1973-04-24 | 1973-10-24 | $7700.00 | Window Closed / Lapsed |