Patent US3121701A successfully refreshed from Google Patents.
US3121701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticisation of partially hydrolysed polyvinyl alcohol with trimethylol propane
Assignee: Individual
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Filing: 1962-06-12
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Granted: 1964-02-18
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Richard F J Ingleby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053; C08L; C08L29/00; C08L29/02; C08L29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A COMPOSITION OF MATTER COMPRISING A POLYVINYL ACETATE-DERIVED POLYVINYL ALCOHOL IN WHICH FROM 75 TO 90 OF EVERY 100 ACETATE GROUPS ORIGINALLY PRESENT IN THE POLYVINYL ACETATE FROM WHICH THE POLYVINYL ALCOHOL HAS BEEN DERIVED HAVE BEEN REPLACED BY HYDROXYL GROUPS, AND, AS A PLASTICISER FOR SAID POLYVINYL ALCOHOL, TRIMETHYLOL PROPANE IN AN AMOUNT FROM ABOUT 5 TO ABOUT 50 PARTS BY WEIGHT OF TRIMETHYLOL PROPANE FOR EVERY 100 PARTS OF SAID POLYVINYL ALCOHOL.
Claim 2
Dependent Claim
74 words
A COMPOSITION OF MATTER COMPRISING A POLYVINYL ACETATE-DERIVED POLYVINYL ALCOHOL IN WHICH FROM 75 TO 90 OF EVERY 100 ACETATE GROUPS ORIGINALLY PRESENT IN THE POLYVINYL ACETATE FROM WHICH THE POLYVINYL ALCOHOL HAS BEEN DERIVED HAVE BEEN REPLACED BY HYDROXYL GROUPS, AND, AS A PLASTICISER FOR SAID POLYVINYL ALCOHOL, TRIMETHYLOL PROPANE IN AN AMOUNT FROM ABOUT 5 TO ABOUT 50 PARTS BY WEIGHT OF TRIMETHYLOL PROPANE FOR EVERY 100 PARTS OF SAID POLYVINYL ALCOHOL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |