US4072647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride plastic compositions
Assignee: Chevron USA Inc
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Filing: 1976-06-16
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Granted: 1978-02-07
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Expires: 1996-06-16
Abstract
Abstract 3,3'-(3-Methylpentylene-1,5-dioxy) dipropionic acid and esters thereof useful as plasticizers.
Inventors
- 👤 Ronald A. Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C07; C07C; C07C59/00; C07C59/235; C07C59/305; C08K5/10; C08K5/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
Polyvinyl chloride plastic compositions containing a compound of the formula ##STR3## wherein the R groups are primary alkyl of from 4 to 12 carbon atoms, in minor amounts sufficient to impart plasticizing properties.
Claim 2
Dependent Claim
33 words
Polyvinyl chloride plastic compositions containing a compound of the formula ##STR3## wherein the R groups are primary alkyl of from 4 to 12 carbon atoms, in minor amounts sufficient to impart plasticizing properties.
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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |