US2671070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of dicyclopentadiene, maleic anhydride, and a glycol, and copolymers thereof
Assignee: Uniroyal Inc
•
Filing: 1951-12-08
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Granted: 1954-03-02
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Expires: 1971-12-08
Abstract
No abstract record available.
Inventors
- 👤 Robert L Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:57
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
86 words
A HEAT REACTION PRODUCT OF A MIXTURE CONSISTING ESSENTIALLY OF A GLYCOL, AN ACIDIC MATERIAL SELECTED FROM THE CLASS CONSISTING OF MALEIC ACID AND ITS ANHYDRIDE, AND DICYCLOPENTADIENE, THE MOL RATIO OF THE GLYCOL TO THE ACIDIC MATERIAL BEING AT LEAST ONE-TO-ONE, THE MOLE RATIO OF THE DICYCLOPENTADIENE TO THE ACIDIC MATERIAL BEING IN THE RANGE FROM ABOUT 0.3 TO ABOUT 0.4 MOL PER MOL OF THE ACIDIC MATERIAL, SAID REACTION BEING AT A TEMPERATURE IN THE RANGE OF ABOUT 140* C. TO ABOUT 220* C.
Claim 2
Dependent Claim
86 words
A HEAT REACTION PRODUCT OF A MIXTURE CONSISTING ESSENTIALLY OF A GLYCOL, AN ACIDIC MATERIAL SELECTED FROM THE CLASS CONSISTING OF MALEIC ACID AND ITS ANHYDRIDE, AND DICYCLOPENTADIENE, THE MOL RATIO OF THE GLYCOL TO THE ACIDIC MATERIAL BEING AT LEAST ONE-TO-ONE, THE MOLE RATIO OF THE DICYCLOPENTADIENE TO THE ACIDIC MATERIAL BEING IN THE RANGE FROM ABOUT 0.3 TO ABOUT 0.4 MOL PER MOL OF THE ACIDIC MATERIAL, SAID REACTION BEING AT A TEMPERATURE IN THE RANGE OF ABOUT 140* C. TO ABOUT 220* C.
References Cited (Backward Citations)
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US2235447A
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US2404836A
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US2387895A
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US2475731A
Cited
US2577005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |