US3756979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of plasticizing vinyl halide polymers
Assignee: Individual
•
Filing: 1971-01-21
•
Granted: 1973-09-04
•
Expires: 1991-01-21
Abstract
Abstract THIS INVENTION RELATES TO AN IMPROVED METHOD FOR PLASTICIZING POLYVINYL HALIDES, WHEREIN THEPLASTICIZED PRODUCT IS STABILIZED AGAINST DISCOLORATION. GENERALLY, THE METHOD COMPRISES THE STEPS OF WET BALL MILLING THE RESIN IN A LIQUID SLURRY FOR A SPECIFIED PERIOD OF TIME, DELIQUIFYING AND DRYING THE RESIN OF SAID SLURRY, THEN ADDING PLASTICIZER AND RECOVERING THE PLASTICIZED PRODUCT.
Inventors
- 👤 R Ventres
- 👤 E Duchesneau
- 👤 C Rosis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:32
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/18; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |