US3281384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of solid polymer dispersions
Assignee: Phillips Petroleum Co
•
Filing: 1960-10-28
•
Granted: 1966-10-25
•
Expires: 1980-10-28
Abstract
No abstract record available.
Inventors
- 👤 Richard E Dietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:28
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2323/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
A METHOD FOR MAINTAINING A SLURRY CONSISTING ESSENTIALLY OF FINELY DIVIDED, SOLID 1-OLEFIN POLYMER IN AN INERT LIQUID CONSISTING ESSENTIALLY OF ADDING TO SAID SLURRY ABOUT 0.1 TO 10 PARTS PER 100 PARTS OF POLYMER BY WEIGHT OF A QUANTERNARY AMMONIUM HALIDE AND ABOUT 10 TO 30 PARTS PER 100 PARTS OF POLYMER BY WEIGHT OF SILICA HAVING A PARTICLE SIZE OF 50 SCREEN MESH OR SMALLER IN AMOUNTS SUFFICIENT TO PREVENT AGGLOMERATION OF POLYMER PARTICLES AT A TEMPERATURE ABOVE THE SOFTENING POINT OF THE PARTICLES.
Claim 2
Independent Claim
86 words
A METHOD FOR MAINTAINING A SLURRY CONSISTING ESSENTIALLY OF FINELY DIVIDED, SOLID 1-OLEFIN POLYMER IN AN INERT LIQUID CONSISTING ESSENTIALLY OF ADDING TO SAID SLURRY ABOUT 0.1 TO 10 PARTS PER 100 PARTS OF POLYMER BY WEIGHT OF A QUANTERNARY AMMONIUM HALIDE AND ABOUT 10 TO 30 PARTS PER 100 PARTS OF POLYMER BY WEIGHT OF SILICA HAVING A PARTICLE SIZE OF 50 SCREEN MESH OR SMALLER IN AMOUNTS SUFFICIENT TO PREVENT AGGLOMERATION OF POLYMER PARTICLES AT A TEMPERATURE ABOVE THE SOFTENING POINT OF THE PARTICLES.
Claim 3
Dependent Claim
43 words
A STABLE DISPERSION OF A FINELY DIVIDED, SOLID OLEFIN POLYMER IN AN INERT LIQUID WHEREIN SAID DISPERSION CONTAINS A QUATERNARY AMMONIUM HALIDE AND SILICA HAVING A PARTICLE SIZE OF 50 SCREEN MESH OR SMALLER IN AMOUNTS SUFFICIENT TO PREVENT AGGLOMERATION OF SAID POLYMER.
Claim 4
Dependent Claim
43 words
A STABLE DISPERSION OF A FINELY DIVIDED, SOLID OLEFIN POLYMER IN AN INERT LIQUID WHEREIN SAID DISPERSION CONTAINS A QUATERNARY AMMONIUM HALIDE AND SILICA HAVING A PARTICLE SIZE OF 50 SCREEN MESH OR SMALLER IN AMOUNTS SUFFICIENT TO PREVENT AGGLOMERATION OF SAID POLYMER.
References Cited (Backward Citations)
US2138226A
Cited
US2422919A
Cited
US2403966A
Cited
US2503252A
Cited
US2592763A
Cited
US2859190A
Cited
US2809950A
Cited
US3035038A
Cited
US2965596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |