US2939858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light resistant copolymer of poly (alkylene-maleate-hexahydro orthophthalate) and styrene
Assignee: Uniroyal Inc
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Filing: 1957-08-16
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Granted: 1960-06-07
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Expires: 1977-08-16
Abstract
No abstract record available.
Inventors
- 👤 Cummings William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:31
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/553
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A LIGHT RESISTANT RESINOUS COPOLYMER CONSISTING AN UNSATURATED POLYESTER WHICH IS A POLY (ALKYLENE MALEATE-HEXAHYDRO ORTHO-PHTHALATE) IN WHICH THE MOLAR RATIO OF COMBINED MALEIC ACID ANHYDRIDE TO THE HEXAHYDRO ORTHO-PHTHALIC ACID ANHYDRIDE RANGES FROM 0.6:0.4 TO 0.4:0.6, AND A SINGLE CROSS-LINKING AGENT WHICH IS A MONOETHYLENIC COMPOUND COPOLYMERIZABLE WITH SAID POLYESTER, SAID CROSS-LINKING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF STYRENE AND VINYL TOLUENE, THE AMOUNT OF SAID CROSS-LINKING AGENT BEING EQUAL TO FROM 25 TO 35% BY WEIGHT OF THE SUM OF SAID POLYESTER AND SAID CROSS-LINKING AGENT.
Claim 2
Dependent Claim
90 words
A LIGHT RESISTANT RESINOUS COPOLYMER CONSISTING AN UNSATURATED POLYESTER WHICH IS A POLY (ALKYLENE MALEATE-HEXAHYDRO ORTHO-PHTHALATE) IN WHICH THE MOLAR RATIO OF COMBINED MALEIC ACID ANHYDRIDE TO THE HEXAHYDRO ORTHO-PHTHALIC ACID ANHYDRIDE RANGES FROM 0.6:0.4 TO 0.4:0.6, AND A SINGLE CROSS-LINKING AGENT WHICH IS A MONOETHYLENIC COMPOUND COPOLYMERIZABLE WITH SAID POLYESTER, SAID CROSS-LINKING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF STYRENE AND VINYL TOLUENE, THE AMOUNT OF SAID CROSS-LINKING AGENT BEING EQUAL TO FROM 25 TO 35% BY WEIGHT OF THE SUM OF SAID POLYESTER AND SAID CROSS-LINKING AGENT.
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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |