US3726840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of episulfides using metal-containing catalysts
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1964-10-16
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Granted: 1973-04-10
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Expires: 1984-10-16
Abstract
Abstract A METHOD FOR MAKING A POLYSULFIDE WHICH COMPRISES POLYMERIZING AN EPISULFIDE MONOMER IN THE PRESENCE EITHER OF THE FOLLOWING CATALYSTS: (A) TRIPHENYL ALUMINUM AND WATER (B) ANTIMONY TRIOXIDE AND DIETHYL ZINC (C) THE REACTION PRODUCT OF TITANIUM TETRACHLORIDE ANDTRIETHYL ALUMINUM (D) ZINC COBALTICYANIDE OR (E) ZINC FERRICYANIDE.
Inventors
- 👤 G Gmitter
- 👤 J Mudde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:12
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12; C08G75/00; C08G75/02; C08G75/06; C08G75/08
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |