Patent US3285996A successfully refreshed from Google Patents.
US3285996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin graft copolymer processing
Assignee: Dow Chemical Co
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Filing: 1962-12-26
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Granted: 1966-11-15
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Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Roland E Gunderman
- 👤 Irvin B Kritzman
- 👤 James A Moffitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:53
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/16; C08F; C08F255/00; C08F6/00; C08F6/14; C08J2351/00; C08J2351/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD FOR THE PREPARATION OF POLYDEFIN-ACRYLIC ACID GRAFT COPOLYMER GRANULAR PARTICLES, THE STEPS OF THE METHOD COMPRISING PROVIDING A DISPERSION OF A SOLVATED POLYOLEFIN-ACRYLIC ACID GRAFT COPOLYMER WHEREIN THE POLYOLEFIN IS A POLYMER OF MONOOLEFINIC NON-AROMATIC ALIPHATIC HYDROCARBONS CONTAINING FROM 2 TO 6 CARBON ATOMS IN AN ORGANIC MEDIUM WHEREIN THE RATIO OF COPOLYMER TO ORGANIC MEDIUM IS LESS THAN OF ABOUT 1:3; ADMIXING SAID DISPERSION WITH WATER., DISTILLING FROM THE WATER-ORGANIC-POLYMER DISPERSION THE ORGANIC SOLVENT UNTIL THE ORGANIC SOLVENT IN PRESENT IN A RATIO OF FROM ABOUT 2 ABOUT 3 PARTS OF SOLVENT BY WEIGHT PER PART OF POLYMER; AGIATING THE WATER-ORGANIC-POLYMER DISPERSION TO DISPERSE THE ORGANIC MATERIAL WITHIN THE WATER IN A SUBSTANTIALLY UNIFORM MANNER WHEREIN EACH OF THE DROPLETS OF THE ORGANIC MATERIAL CONTAINS A QUANTITY OF POLYOLEFIN GRAFT COPOLYMER THAT IS DESIRED IN THE FINAL INDIVIDUAL PARTICLE; DISTILLING FROM THE WATER-ORGANIC-POLYMER DISPERSION THE REMAINING PORTION OF THE ORGANIC MATERIAL AND MAINTAINING AGAITATION UNTIL THE RATIO OF THE ORGANIC MATERIAL TO THE POLYOLEFIN IS LESS THAN 2:1 BY WEIGHT, SUBSEQUENTLY RECOVERING GRANULAR GRAFT COPOLYMER PARTICLES.
Claim 2
Independent Claim
179 words
A METHOD FOR THE PREPARATION OF POLYDEFIN-ACRYLIC ACID GRAFT COPOLYMER GRANULAR PARTICLES, THE STEPS OF THE METHOD COMPRISING PROVIDING A DISPERSION OF A SOLVATED POLYOLEFIN-ACRYLIC ACID GRAFT COPOLYMER WHEREIN THE POLYOLEFIN IS A POLYMER OF MONOOLEFINIC NON-AROMATIC ALIPHATIC HYDROCARBONS CONTAINING FROM 2 TO 6 CARBON ATOMS IN AN ORGANIC MEDIUM WHEREIN THE RATIO OF COPOLYMER TO ORGANIC MEDIUM IS LESS THAN OF ABOUT 1:3; ADMIXING SAID DISPERSION WITH WATER., DISTILLING FROM THE WATER-ORGANIC-POLYMER DISPERSION THE ORGANIC SOLVENT UNTIL THE ORGANIC SOLVENT IN PRESENT IN A RATIO OF FROM ABOUT 2 ABOUT 3 PARTS OF SOLVENT BY WEIGHT PER PART OF POLYMER; AGIATING THE WATER-ORGANIC-POLYMER DISPERSION TO DISPERSE THE ORGANIC MATERIAL WITHIN THE WATER IN A SUBSTANTIALLY UNIFORM MANNER WHEREIN EACH OF THE DROPLETS OF THE ORGANIC MATERIAL CONTAINS A QUANTITY OF POLYOLEFIN GRAFT COPOLYMER THAT IS DESIRED IN THE FINAL INDIVIDUAL PARTICLE; DISTILLING FROM THE WATER-ORGANIC-POLYMER DISPERSION THE REMAINING PORTION OF THE ORGANIC MATERIAL AND MAINTAINING AGAITATION UNTIL THE RATIO OF THE ORGANIC MATERIAL TO THE POLYOLEFIN IS LESS THAN 2:1 BY WEIGHT, SUBSEQUENTLY RECOVERING GRANULAR GRAFT COPOLYMER PARTICLES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |