Patent US3817901A successfully refreshed from Google Patents.
US3817901A
Expired / Lapsed
US
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Process for preparing a new substance that is suitable for use as a plasticizer in polymeric compounds
Assignee: Stamicarbon BV
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Filing: 1972-05-12
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Granted: 1974-06-18
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Expires: 1992-05-12
Abstract
Abstract DIESTERS OF THE FORMULA R-O-CH(-CH3)-CH2-O-R'' WHEREIN ONE OF R AND R'' IS -CH2-CH2-OR" AND THE OTHER OF R AND R'' IS R'''''', WHEREIN ONE OF R" AND R'''''' IS PHENYL-CO- AND THE OTHER OF R" IS PHENYL-CO- OR CNH(2N+1)-CO- WHEREIN N IS A NUMBER FROM 5 TO 11, AND PROCESS FOR MAKING SAME, ARE DISCLOSED. THE USE OF THESE DIESTERS AS PLASTICIZERS IN ORGANIC POLYMERS, SUCH AS ACRYLIC POLYMERS AND VINYL POLYMERS, IS ALSO DISCLOSED.
Inventors
- 👤 S Schaafsma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103
Claims Analysis
Total Claims: 0
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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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |