US2879235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition comprising cellulose derivative, epoxy resin and epoxy curing catalyst and process for preparing same
Assignee: Shell Development Co
•
Filing: 1953-07-21
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Granted: 1959-03-24
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Expires: 1973-07-21
Abstract
No abstract record available.
Inventors
- 👤 Fred E Condo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:37
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A COMPOSITION CAPABLE OF BEING FORMED INTO SHAPED ARTICLES HAVING IMPROVED RESISTANCE TO SOLVENTS AND HEAT COMPRISING A SOLUTION CONTAINING A CELLULOSE DERIVATIVE OF THE GROUP CONSISTING OF CELLULOSE ESTERS AND ETHERS SAID DERIVATIVES POSSESSING FREE HYDROXYL GROUPS, FROM 10 PARTS TO 50 PARTS PER 100 PARTS OF THE CELLULOSE DERIVATIVE OF A POLYETHER POLYEPOXIDE HAVING A 1.2-EPOXY EQUIVALENCY OF AT LEAST 1.1, AND AN EPOXY-BOXYLC ACIDS, PHOSPHINIC THE GROUP CONSISTING OF POLYCARBOXYLIC ACIDS CONTAINING NO MORE THAN 9 CARBONS ATOMS AND THEIR ANHYDRIDES, PHOSPHORIC ACID, BORIC ACID, SULFONIC ACIDS, PHOSPHINIC ACIDS, PERCHLORIC ACID, PERSULFURIC ACID, BORON TRIFFUORIDE COMPLEXES, AND SALTS OF METAL HAVING AN ATOMIC WEIGHT BETWEEN 24 AND 210 AND THE FOLLOWING ACIDS, FLUOBORIC ACID, PERSULFURIC ACID, PERCHLORIC ACID, SULFURIC ACID, PHOSPHORIC ACID, PHOSPHOROUS ACID, FLUOSILICIC ACID, SULFUROUS ACID, BORIC ACID, MOLYBDIC ACID,ARSENOUS ACID, SILICIC ACID, CHLORIC ACID AND HYPOPHOSPHOROUS ACID.
Claim 2
Dependent Claim
143 words
A COMPOSITION CAPABLE OF BEING FORMED INTO SHAPED ARTICLES HAVING IMPROVED RESISTANCE TO SOLVENTS AND HEAT COMPRISING A SOLUTION CONTAINING A CELLULOSE DERIVATIVE OF THE GROUP CONSISTING OF CELLULOSE ESTERS AND ETHERS SAID DERIVATIVES POSSESSING FREE HYDROXYL GROUPS, FROM 10 PARTS TO 50 PARTS PER 100 PARTS OF THE CELLULOSE DERIVATIVE OF A POLYETHER POLYEPOXIDE HAVING A 1.2-EPOXY EQUIVALENCY OF AT LEAST 1.1, AND AN EPOXY-BOXYLC ACIDS, PHOSPHINIC THE GROUP CONSISTING OF POLYCARBOXYLIC ACIDS CONTAINING NO MORE THAN 9 CARBONS ATOMS AND THEIR ANHYDRIDES, PHOSPHORIC ACID, BORIC ACID, SULFONIC ACIDS, PHOSPHINIC ACIDS, PERCHLORIC ACID, PERSULFURIC ACID, BORON TRIFFUORIDE COMPLEXES, AND SALTS OF METAL HAVING AN ATOMIC WEIGHT BETWEEN 24 AND 210 AND THE FOLLOWING ACIDS, FLUOBORIC ACID, PERSULFURIC ACID, PERCHLORIC ACID, SULFURIC ACID, PHOSPHORIC ACID, PHOSPHOROUS ACID, FLUOSILICIC ACID, SULFUROUS ACID, BORIC ACID, MOLYBDIC ACID,ARSENOUS ACID, SILICIC ACID, CHLORIC ACID AND HYPOPHOSPHOROUS ACID.
References Cited (Backward Citations)
US2267842A
Cited
GB506999A
Cited
US2394910A
Cited
US2450234A
Cited
US2643244A
Cited
US2710844A
Cited
US2633458A
Cited
US2710845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |