US3776872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of aqueous dispersions of modified synthetic con-jugated diene polymers
Assignee: Shell USA Inc
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Filing: 1972-03-16
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Granted: 1973-12-04
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Expires: 1992-03-16
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF DISPERSIONS OF SYNTHETIC CONJUGATED DIENE SOLUTION POLYMERS CONTAINING TOLUENE INSOLUBLE GEL COMPRISES TREATMENT OF AN AQUEOUS POLYMER DISPERSION WITH A FREE RADICAL YIELDING SUBSTANCE AT A TEMPERATURE ABOVE 20*C. IN THE ABSENCE OF A COMPOUND THAT WOULD FORM A REDOX SYSTEM.
Inventors
- 👤 Heij G La
- 👤 Amerongen G Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:09
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/04
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |