Patent US2631988A successfully refreshed from Google Patents.
US2631988A
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US
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Mixed plasticizers
Assignee: Individual
•
Filing: 1950-10-06
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Granted: 1953-03-17
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Expires: 1970-10-06
Abstract
No abstract record available.
Inventors
- 👤 Martin L Fein
- 👤 Charles H Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; C08K5/15; C08K5/151; C08K5/1535
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A COMPOSITION COMPRISING A POLYVINYL CHLORIDE-ACETATE POLYMER PLASTICIZER WITH A PLASTICIZER OF THE GROUP CONSISTING OF DIALKYL ESTERS OF PHTHALIC ACID AND TRIARYL ESTERS OF PHOSPHORIC ACID, HAVING INCORPORATED THEREIN A MATERIAL FROM THE GROUP CONSISTING OF COMPOUNDS REPRESENTED BY THE FORMULAS:
Claim 2
Dependent Claim
42 words
A COMPOSITION COMPRISING A POLYVINYL CHLORIDE-ACETATE POLYMER PLASTICIZER WITH A PLASTICIZER OF THE GROUP CONSISTING OF DIALKYL ESTERS OF PHTHALIC ACID AND TRIARYL ESTERS OF PHOSPHORIC ACID, HAVING INCORPORATED THEREIN A MATERIAL FROM THE GROUP CONSISTING OF COMPOUNDS REPRESENTED BY THE FORMULAS:
References Cited (Backward Citations)
US2122716A
Cited
US2500918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |