US2939860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene-butyl rubber blends
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1957-05-08
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Granted: 1960-06-07
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Expires: 1977-05-08
Abstract
No abstract record available.
Inventors
- 👤 Charles K Schramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:02
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L21/00; C08L53/00; C08L53/02; Y; Y10; Y10S; Y10S138/00; Y10S138/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
COMPOSITION OF MATTER COMPRISING (A) 100 PARTS OF A SOLID PLASTIC PROPYLENE POLYMER CHARACTERIZED BY A MOLECULAR WEIGHT OF ABOUT 50,000 TO 500,000, DENSITY BETWEEN 0,86 AND 0.91 A MELTING POINT ABOVE 125*C., A CRYSTALLINITY OF 40 TO 95% AND A TENSILE STRENGTH ABOVE 1,000 P.S.I., AND (B) 15 TO 35 PARTS OF BUTYL RUBBER WHICH IS A COPOLYMER OF ISOBUTYLENE AND A CONJUGATED C4 TO C6 DIOLEFIN, SAID COPOLYMER CHARACTERIZED BY AN UNSATURATION OF ABOUT 1.30 TO 2.5 MOLE PERCENT.
Claim 2
Dependent Claim
81 words
COMPOSITION OF MATTER COMPRISING (A) 100 PARTS OF A SOLID PLASTIC PROPYLENE POLYMER CHARACTERIZED BY A MOLECULAR WEIGHT OF ABOUT 50,000 TO 500,000, DENSITY BETWEEN 0,86 AND 0.91 A MELTING POINT ABOVE 125*C., A CRYSTALLINITY OF 40 TO 95% AND A TENSILE STRENGTH ABOVE 1,000 P.S.I., AND (B) 15 TO 35 PARTS OF BUTYL RUBBER WHICH IS A COPOLYMER OF ISOBUTYLENE AND A CONJUGATED C4 TO C6 DIOLEFIN, SAID COPOLYMER CHARACTERIZED BY AN UNSATURATION OF ABOUT 1.30 TO 2.5 MOLE PERCENT.
References Cited (Backward Citations)
US2472495A
Cited
US2569541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |