US2647887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the stabilization of sulfur dioxide-rubbery polymer products
Assignee: Shell Development Co
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Filing: 1949-12-16
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Granted: 1953-08-04
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Expires: 1969-12-16
Abstract
No abstract record available.
Inventors
- 👤 Goppel Johan Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:01
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR PREPARING INSOLUBLE REACTION PRODUCTS OF SULFUR DIOXIDE AND HYDROPEROXIDE ACTIVATED RUBBERY POLYMERS WHICH PRODUCTS HAVE INCREASED RESISTANCE TO DETERIORATION, WHICH CONSISTS OF ADDING FROM 0.1% TO 2% BY WEIGHT OF A SULFUR COMPOUND OF THE GROUP CONSISTING OF FREE SULFUR AND SULFUR-CONTAINING COMPOUNDS WHICH ENGENDER DEPOSITION OF FREE SULFUR, TO A SOLUTION OF A HYDROPEROXIDE ACTIVATED SOLUBLE RUBBERY POLYMER OF A COMPOUND OF THE GROUP CONSISTING OF CONJUGATED DIOLEFINS AND CHLOROPRENE SO AS TO FORM A MIXTURE OF THE SAID SULFUR COMPOUND AND THE RUBBERY POLYMER, AND THEN CONTACTING THE RESULTING MIXTURE WITH SULFUR DIOXIDE AT A TEMPERATURE NOT IN EXCESS OF ABOUT -5* C. SO AS TO FORM AN INSOLUBLE REACTION PRODUCT.
Claim 2
Dependent Claim
116 words
A PROCESS FOR PREPARING INSOLUBLE REACTION PRODUCTS OF SULFUR DIOXIDE AND HYDROPEROXIDE ACTIVATED RUBBERY POLYMERS WHICH PRODUCTS HAVE INCREASED RESISTANCE TO DETERIORATION, WHICH CONSISTS OF ADDING FROM 0.1% TO 2% BY WEIGHT OF A SULFUR COMPOUND OF THE GROUP CONSISTING OF FREE SULFUR AND SULFUR-CONTAINING COMPOUNDS WHICH ENGENDER DEPOSITION OF FREE SULFUR, TO A SOLUTION OF A HYDROPEROXIDE ACTIVATED SOLUBLE RUBBERY POLYMER OF A COMPOUND OF THE GROUP CONSISTING OF CONJUGATED DIOLEFINS AND CHLOROPRENE SO AS TO FORM A MIXTURE OF THE SAID SULFUR COMPOUND AND THE RUBBERY POLYMER, AND THEN CONTACTING THE RESULTING MIXTURE WITH SULFUR DIOXIDE AT A TEMPERATURE NOT IN EXCESS OF ABOUT -5* C. SO AS TO FORM AN INSOLUBLE REACTION PRODUCT.
References Cited (Backward Citations)
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Cited
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Cited
US2115053A
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US2075251A
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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) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |