US3175999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block polymers of alpha-olefines, processes for producing the same, and mixtures thereof with isotactic polyolefines
Assignee: MINTECATINI GENERALE P Soc
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Filing: 1956-08-03
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Granted: 1965-03-30
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Expires: 1976-08-03
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Crespi Giovanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:55
CPC Classifications
B; B29; B29C; B29C59/00; C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; C08F10/08; C08F10/14; C08F110/00; C08F110/04; C08F110/06; C08F112/00; C08F112/02; C08F112/04; C08F112/06; C08F112/08; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; C08F6/00; C08F6/04; C08L; C08L53/00; C08F110/08; C08F110/14; C08F210/00; C08F210/16; Y; Y10; Y10S; Y10S526/00; Y10S526/907; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
SUBSTANTIALLY LINEAR, SUBSTANTIALLY HOMOGENEOUS HEAD-TO-TAIL STEREOISOMER BLOCK POLYMERS OF A SINGLE ALPHAOLEFINE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
16 words
SUBSTANTIALLY LINEAR, SUBSTANTIALLY HOMOGENEOUS HEAD-TO-TAIL STEREOISOMER BLOCK POLYMERS OF A SINGLE ALPHAOLEFINE OF THE GENERAL FORMULA
Claim 3
Dependent Claim
85 words
MIXTURE OF ISOTACTIC POLYMERS OF AN ALPHA-OLEFINE WITH SUBSTANTIALLY HOMOGENEOUS STEREOISOMER BLOCK POLYMERS OF ALPHA-OLEFINE HAVING THE FORMULA CH2=CHR WHERE R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS CONTAINING FROM 1 TO 6 CARBON ATOMS AND ARYL RADICALS, WHICH BLOCK POLYMERS ARE COMPOSED OF MACROMOLECULES CONTAINING (A) CRYSTALLIZABLE ISOTACTIC SECTIONS AND (B) NON-CRYSTALLIZABLE, ATACTIC SECTIONS, WHICH SECTIONS (A) AND (B) ARE INSEPARABLE BY SOLVENT FRACTIONATION, SAID MIXTURES BEING CHARACTERIZED BY HIGH TENSILE STRENGTH AND, WHEN ORIENTED BY STRETCHING, A HIGH REVERSIBLE ELASTIC ELONGATION.
Claim 4
Dependent Claim
85 words
MIXTURE OF ISOTACTIC POLYMERS OF AN ALPHA-OLEFINE WITH SUBSTANTIALLY HOMOGENEOUS STEREOISOMER BLOCK POLYMERS OF ALPHA-OLEFINE HAVING THE FORMULA CH2=CHR WHERE R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS CONTAINING FROM 1 TO 6 CARBON ATOMS AND ARYL RADICALS, WHICH BLOCK POLYMERS ARE COMPOSED OF MACROMOLECULES CONTAINING (A) CRYSTALLIZABLE ISOTACTIC SECTIONS AND (B) NON-CRYSTALLIZABLE, ATACTIC SECTIONS, WHICH SECTIONS (A) AND (B) ARE INSEPARABLE BY SOLVENT FRACTIONATION, SAID MIXTURES BEING CHARACTERIZED BY HIGH TENSILE STRENGTH AND, WHEN ORIENTED BY STRETCHING, A HIGH REVERSIBLE ELASTIC ELONGATION.
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |