US3157609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of synthetic rubber
Assignee: Ashland LLC
•
Filing: 1960-12-12
•
Granted: 1964-11-17
•
Expires: 1980-12-12
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Mcnay
- 👤 William R Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:15
CPC Classifications
C; C08; C08L; C08L21/00; C08L57/00; C08L9/00; C08L9/06; C08K; C08K5/00; C08K5/0008; C08K5/0016; C08L91/00; C08L93/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN THE PROCESSING OF A SOLID SYNTHETIC RUBBER POLYMER, THE METHOD OF IMPARTING IMPROVED PROCESSING CHARACTERISTICS TO SAID POLYMER WHICH COMPRISES: ADDING TO THE POLYMER AS A PROCESSING AID ABOUT 1.0-30% BY WEIGHT OF THE POLYMER OF A COMBINATIN CONSISTING ESSENTIALLY OF A PHYSICAL RUBBER SOFTENER SELECTED FROM THE GROUP CONSISTING OF AN AROMATIC PETROLEUM OIL, PINE TAR AND ROSIN ACID SOAP AND A HYDROCARBON SOLUBLE EXTRACT OF THE PLANT GRINDELIA OBTAINED BY EXTRACTING SAID PLANT WITH A HYDROCARBON, SAID SOFTENER AND SAID EXTRACT BEING IN A RATIO BY WEIGHT OF ABOUT 10:1.5-1.5:10, AND PROCESSING THE RESULTANT MIXTURE COMPRISING SAID SOLID POLYMER AND SAID PROCESSING AID.
Claim 2
Dependent Claim
106 words
IN THE PROCESSING OF A SOLID SYNTHETIC RUBBER POLYMER, THE METHOD OF IMPARTING IMPROVED PROCESSING CHARACTERISTICS TO SAID POLYMER WHICH COMPRISES: ADDING TO THE POLYMER AS A PROCESSING AID ABOUT 1.0-30% BY WEIGHT OF THE POLYMER OF A COMBINATIN CONSISTING ESSENTIALLY OF A PHYSICAL RUBBER SOFTENER SELECTED FROM THE GROUP CONSISTING OF AN AROMATIC PETROLEUM OIL, PINE TAR AND ROSIN ACID SOAP AND A HYDROCARBON SOLUBLE EXTRACT OF THE PLANT GRINDELIA OBTAINED BY EXTRACTING SAID PLANT WITH A HYDROCARBON, SAID SOFTENER AND SAID EXTRACT BEING IN A RATIO BY WEIGHT OF ABOUT 10:1.5-1.5:10, AND PROCESSING THE RESULTANT MIXTURE COMPRISING SAID SOLID POLYMER AND SAID PROCESSING AID.
References Cited (Backward Citations)
US2384910A
Cited
US2415541A
Cited
US2556575A
Cited
US2868741A
Cited
US2864882A
Cited
US2822341A
Cited
US2956973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |