US3254140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propylene-acetylenic hydrocarbon block copolymers and process for preparing same
Assignee: Eastman Kodak Co
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Filing: 1961-12-04
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Granted: 1966-05-31
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Expires: 1981-12-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh J Hagemeyer
- 👤 Marvin B Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:54
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A BLOCK COPOLYMER IN WHICH THE CHAINS CONSIST ESSENTIALLY OF AT LEAST ONE BLOCK OF CRYSTALLINE POLYMERIZED PROPYLENE, AND AT LEAST ONE BLOCK OF CRYSTALLINE POLYMERIZED ACETYLENIC HYDROCARBON, SAID BLOCK COPOLYMER EXHIBITING IMPROVED STIFFNESS IN FLEXURE AND TENSILE STRENGTH AND HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000, A DENSITY OF AT LEAST 0.85 AND CONTAINING AT LEAST 80 PERCENT, BY WEIGHT, OF POLYMERIZED PROPYLENE.
Claim 2
Dependent Claim
65 words
A BLOCK COPOLYMER IN WHICH THE CHAINS CONSIST ESSENTIALLY OF AT LEAST ONE BLOCK OF CRYSTALLINE POLYMERIZED PROPYLENE, AND AT LEAST ONE BLOCK OF CRYSTALLINE POLYMERIZED ACETYLENIC HYDROCARBON, SAID BLOCK COPOLYMER EXHIBITING IMPROVED STIFFNESS IN FLEXURE AND TENSILE STRENGTH AND HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000, A DENSITY OF AT LEAST 0.85 AND CONTAINING AT LEAST 80 PERCENT, BY WEIGHT, OF POLYMERIZED PROPYLENE.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |