US2915494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature curing 1, 3-diene containing elastomers and method of making same
Assignee: 3M Co
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Filing: 1956-12-03
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Granted: 1959-12-01
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Expires: 1976-12-03
Abstract
No abstract record available.
Inventors
- 👤 William J Snoddon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:54
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A SEMI-LIQUID ELASTOMER, HAVING A ROOM TEMPERATURE VISCOSITY IN THE RANGE OF FROM ABOUT 20 TO ABOUT 45,000 POISES, CAPABLE OF SPONTANEOUSLY CURING AT ROOM TEMPERATURE TO A SOLID, RUBBERY, SOLVENT RESISTANT STATE, SAID ELASTOMER COMPRISING IN PARTS BY WEIGHT (1), FROM ABOUT 1 TO ABOUT 4 PARTS OF AN EPOXIDIZED SEMI-LIQUID 1,3-DIENE HOMOPOLYMER HAVING ABOUT 0.4 TO 7 WEIGHT PERCENT OXIRANE OXYGEN, AND (2), ABOUT 1 PART OF A MIXTURE OF ABOUT 10 PARTS BY WEIGHT OF A SEMI-LIQUID 1,3-DIENE HOMOPOLYMER AND FROM ABOUT 1 TO 5 PARTS BY WEIGHT OF A STRONG NON-OXIDIZING POLYFUNCTIONAL ACID MATERIAL SELECTED FROM THE GROUP CONSISTING OF THOSE NON-OXIDIZING POLYBASIC ACIDS HAVING A MINIMUM DISSOCIATION CONSTANT FOR THE FIRST HYDROGEN OF AT LEAST ABOUT 10-2, THE ANHYDRIDES, AND SOLUBLE ESTERS OF SUCH ACIDS.
Claim 2
Dependent Claim
130 words
A SEMI-LIQUID ELASTOMER, HAVING A ROOM TEMPERATURE VISCOSITY IN THE RANGE OF FROM ABOUT 20 TO ABOUT 45,000 POISES, CAPABLE OF SPONTANEOUSLY CURING AT ROOM TEMPERATURE TO A SOLID, RUBBERY, SOLVENT RESISTANT STATE, SAID ELASTOMER COMPRISING IN PARTS BY WEIGHT (1), FROM ABOUT 1 TO ABOUT 4 PARTS OF AN EPOXIDIZED SEMI-LIQUID 1,3-DIENE HOMOPOLYMER HAVING ABOUT 0.4 TO 7 WEIGHT PERCENT OXIRANE OXYGEN, AND (2), ABOUT 1 PART OF A MIXTURE OF ABOUT 10 PARTS BY WEIGHT OF A SEMI-LIQUID 1,3-DIENE HOMOPOLYMER AND FROM ABOUT 1 TO 5 PARTS BY WEIGHT OF A STRONG NON-OXIDIZING POLYFUNCTIONAL ACID MATERIAL SELECTED FROM THE GROUP CONSISTING OF THOSE NON-OXIDIZING POLYBASIC ACIDS HAVING A MINIMUM DISSOCIATION CONSTANT FOR THE FIRST HYDROGEN OF AT LEAST ABOUT 10-2, THE ANHYDRIDES, AND SOLUBLE ESTERS OF SUCH ACIDS.
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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |