US3239481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel elastomeric compositions
Assignee: Shell USA Inc
•
Filing: 1961-02-09
•
Granted: 1966-03-08
•
Expires: 1981-02-09
Abstract
No abstract record available.
Inventors
- 👤 Dale J Meier
- 👤 Davison Sol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:18
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K3/00; C08K3/02; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/36; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/14; C08K9/00; C08K9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A SULFUR VULCANIZABLE COMPOSITION COMPRISING A BLEND OF (1) AN ELASTOMERIC COPOLYMER OF MONO-ALPHAOLEFINS HAVING UP TO 6 CARBON ATOMS THE COPOLYMER BEING ESSENTIALLY FREE OF ETHYLENIC UNSATURATION, (2) A MODIFIED SILICA SUBSTRATE WHEREIN THE SILICA CONTAINS SURFACE SILANOL GROUPS THAT ARE REPLACED WITH RADICALS CONTAINING TERMINAL ALKYL GROUPS HAVING FROM 1 TO 18 CARBON ATOMS, (3) A COMPOUND OF A BASIC METAL SELECTED FROM THE GROUP CONSISTING OF BASIC METAL OXIDES, BASIC METAL SALTS OF ORGANIC ACIDS HAVING AN IONIZATION CONSTANT LESS THAN 10**-4, AND BASIC LEAD SALTS, (4) SULFUR AND (5) A FREE RADICAL SOURCE OF A GROUP CONSISTING OF ORGANIC PEROXIDES AND ARYLSUBSTITUTED TRIAZENES.
Claim 2
Dependent Claim
107 words
A SULFUR VULCANIZABLE COMPOSITION COMPRISING A BLEND OF (1) AN ELASTOMERIC COPOLYMER OF MONO-ALPHAOLEFINS HAVING UP TO 6 CARBON ATOMS THE COPOLYMER BEING ESSENTIALLY FREE OF ETHYLENIC UNSATURATION, (2) A MODIFIED SILICA SUBSTRATE WHEREIN THE SILICA CONTAINS SURFACE SILANOL GROUPS THAT ARE REPLACED WITH RADICALS CONTAINING TERMINAL ALKYL GROUPS HAVING FROM 1 TO 18 CARBON ATOMS, (3) A COMPOUND OF A BASIC METAL SELECTED FROM THE GROUP CONSISTING OF BASIC METAL OXIDES, BASIC METAL SALTS OF ORGANIC ACIDS HAVING AN IONIZATION CONSTANT LESS THAN 10**-4, AND BASIC LEAD SALTS, (4) SULFUR AND (5) A FREE RADICAL SOURCE OF A GROUP CONSISTING OF ORGANIC PEROXIDES AND ARYLSUBSTITUTED TRIAZENES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |