US2631994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinking organo-polysulfide rubber
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1949-09-21
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Granted: 1953-03-17
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Expires: 1969-09-21
Abstract
No abstract record available.
Inventors
- 👤 Grotenhuis Theodore A Te
- 👤 Gilbert H Swart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:16
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/14; C08G75/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF PREPARING A RUBBERY ORGANIC POLYSULFIDE POLYMER THAT IS VULCANIZABLE WITH POLYCARBOXYLIC ACID AND ANHYDRIDES THEREOF TO THE ELASTIC STATE GENERALLY SIMILAR TO THAT OF SOFT VULCANIZED RUBBER, SAID METHOD INCLUDING THE STEPS OF CONDENSING AN EXCESS OF AN ALKALI METAL POLYSULLIDE WITH A MIXTURE OF A GLYCEROL DICHLOROHYDRIN AND A LOWER ALKYLENE HALIDE TO FORM AN ELASTOMERIC PRODUCT, SAID GLYCEROL DICHLOROHYDRIN BEING PRESENT IN MINOR PROPORTION RELATIVE TO SAID ALKYLENE HALIDE, TO PROVIDE ONE HYDROXYL GROUP FOR 10 TO 500 CARBON ATOMS OF SAID POLYSULFIDE POLYMER.
Claim 2
Independent Claim
89 words
A METHOD OF PREPARING A RUBBERY ORGANIC POLYSULFIDE POLYMER THAT IS VULCANIZABLE WITH POLYCARBOXYLIC ACID AND ANHYDRIDES THEREOF TO THE ELASTIC STATE GENERALLY SIMILAR TO THAT OF SOFT VULCANIZED RUBBER, SAID METHOD INCLUDING THE STEPS OF CONDENSING AN EXCESS OF AN ALKALI METAL POLYSULLIDE WITH A MIXTURE OF A GLYCEROL DICHLOROHYDRIN AND A LOWER ALKYLENE HALIDE TO FORM AN ELASTOMERIC PRODUCT, SAID GLYCEROL DICHLOROHYDRIN BEING PRESENT IN MINOR PROPORTION RELATIVE TO SAID ALKYLENE HALIDE, TO PROVIDE ONE HYDROXYL GROUP FOR 10 TO 500 CARBON ATOMS OF SAID POLYSULFIDE POLYMER.
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) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |