US3689447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing emulsion interpolymers containing vinyl chloride and ethylene,having improved heat stability
Assignee: PHILIP A CAUTILLI
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Filing: 1970-06-08
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Granted: 1972-09-05
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Expires: 1990-06-08
Abstract
Abstract THIS INVENTION RELATES TO HEAT RESISTANT INTERPOLYMERS CONTAINING 6-30% ETHYLENE AND 94-70% OF COMONOMER COMPRISING A MAJOR PORTION OF VINYL CHLORIDE. LATEXES OF SAID INTERPOLYMERS, MECHANICALLY STABLE AT HIGH SOLIDS, ARE MADE BY GRADUALLY ADDING SAID COMONOMER TO AN AQUEOUS COMPOSITION MAINTAINED UNDER ETHYLENE PRESSURE NOT HIGHER THAN 3,000 P.S.I., AT A TEMPERATURE BETWEEN ABOUT 50* C. AND 85*C. AND CONTAINING A SEED LATEX AND A THERMALLY ACTIVATED INITIATOR SELECTRED FROM THE GROUP CONSISTING OF WATER-SOLUBLE PERSULFATES AND PEROXYDIPHOSPHATES.
Inventors
- 👤 Samuel J Makower
- 👤 Philip A Cautilli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:45
CPC Classifications
C; C08; C08F; C08F291/00
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |