US3536653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene-propylene rubber compositions containing amorphous polypropylene and extender oil
Assignee: McDonnell Douglas Corp
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Filing: 1965-06-30
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Granted: 1970-10-27
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Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 Frederic W Bickel
- 👤 Gerald H Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:14
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/0008; C08K5/0025; C08L23/10; C08L91/00; C08L2312/00; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
AN UNCURED ETHYLENE-PROPYLENE RUBBER COMPOSITION CONSISTING ESSENTIALLY OF AN ETHYLENE-PROPYLENE RUBBER, FROM ABOUT 2.5 TO ABOUT 50 PARTS OF AMORPHOUS POLYPROPYLENE EFFECTIVE TO IMPART SUBSTANTIAL TACKINESS TO THE RUBBER, AND A HYDROCARBON EXTENDER OIL IN AN AMOUNT OF AT LEAST ABOUT 50 PARTS, BASED ON 100 PARTS BY WEIGHT OF SAID RUBBER, SAID POLYPROPYLENE AND SAID EXTENDER OIL TOGETHER BEING PRESENT IN AN AMOUNT SUFFICIENT TO REDUCE THE MOONEY VISCOSITY OF THE COMPOSITION SO THAT THE RESULTING COMPOSITION IS PROCESSIBLE, SAID EXTENDER OIL BEING SELECTED FROM THE GROUP CONSISTING OF PARAFFINIC OILS HAVING AN ANILINE POINT RANGE OF ABOUT 189 TO ABOUT 240*F., NAPHTHLENIC OILS HAVING AN ANILINE POINT RANGE FROM ABOUT 150 TO ABOUT 250*F., AND AROMATIC OILS HAVING AN ANILINE POINT RANGE FROM ABOUT 100 TO ABOUT 130*F., AND SAID AMORPHOUS POLYPROPYLENE HAVING A MOLECULAR WEIGHT RANGE FROM ABOUT 300 TO ABOUT 25,000.
Claim 2
Dependent Claim
145 words
AN UNCURED ETHYLENE-PROPYLENE RUBBER COMPOSITION CONSISTING ESSENTIALLY OF AN ETHYLENE-PROPYLENE RUBBER, FROM ABOUT 2.5 TO ABOUT 50 PARTS OF AMORPHOUS POLYPROPYLENE EFFECTIVE TO IMPART SUBSTANTIAL TACKINESS TO THE RUBBER, AND A HYDROCARBON EXTENDER OIL IN AN AMOUNT OF AT LEAST ABOUT 50 PARTS, BASED ON 100 PARTS BY WEIGHT OF SAID RUBBER, SAID POLYPROPYLENE AND SAID EXTENDER OIL TOGETHER BEING PRESENT IN AN AMOUNT SUFFICIENT TO REDUCE THE MOONEY VISCOSITY OF THE COMPOSITION SO THAT THE RESULTING COMPOSITION IS PROCESSIBLE, SAID EXTENDER OIL BEING SELECTED FROM THE GROUP CONSISTING OF PARAFFINIC OILS HAVING AN ANILINE POINT RANGE OF ABOUT 189 TO ABOUT 240*F., NAPHTHLENIC OILS HAVING AN ANILINE POINT RANGE FROM ABOUT 150 TO ABOUT 250*F., AND AROMATIC OILS HAVING AN ANILINE POINT RANGE FROM ABOUT 100 TO ABOUT 130*F., AND SAID AMORPHOUS POLYPROPYLENE HAVING A MOLECULAR WEIGHT RANGE FROM ABOUT 300 TO ABOUT 25,000.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |