US3637574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur modified zinc compound/tetraalkylthiuram polysulfide cure system for liquid polythiol polymers
Assignee: ATK Launch Systems LLC
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Filing: 1969-01-16
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Granted: 1972-01-25
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Expires: 1989-01-16
Abstract
Abstract ROOM TEMPERATURE CURED SEALANT COMPOSITION HAVING GREATLY IMPROVED PHYSICAL PROPERTIES IS OBTAINED BY CURING A CURABLE POLYMERIC SEALANT COMPOSITION COMPRISING A LIQUID POLYTHIOL POLYMER, E.G. -SH TERMINATED LIQUID POLYSULFIDE POLYMER, BY MEANS OF A CURING AGENT SYSTEM COMPRISING A ZINC COMPOUND AND A TETRAALKYLTHIURAM POLYSULFIDE ESSENTIALLY MODIFIED BY THE ADDITION OF UP TO ABOUT 10 PARTS BY WEIGHT OF SULFUR PER 100 PARTS BY WEIGHT OF THE POLYMER. THE CURED COMPOSITION HAS UTILITY AS A SEALANT FOR WATERPROOFING, CAULKING AND SIMILAR APPLICATIONS WHERE A RELATIVELY RAPID ROOM TEMPERATURE CURE IS DESIRED.
Inventors
- 👤 Edward G Millen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:50
CPC Classifications
C; C08; C08L; C08L101/00; C08L101/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |