US3342771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the modification of polyolefins using carboxylic compounds
Assignee: Societe Nationale des Petroles dAquitaine SA
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Filing: 1964-06-03
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Granted: 1967-09-19
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Expires: 1984-06-03
Abstract
No abstract record available.
Inventors
- 👤 Cheritat Roland
- 👤 Oddoux Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:06
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/46; C08C; C08C19/00; C08C19/28; C08C19/30; C08C19/34; C08C19/36; Y; Y10; Y10S; Y10S260/00; Y10S260/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD FOR MODIFYING POLYOLEFINS WHICH COMPRISES THE STEPS OF: MIXING A POLYOLEFIN WITH A CARBOXYLIC COMPOUND HAVING AN UNSATURATED ALIPHATIC CHAIN; ADDING TO THE MIXTURE OBTAINED FROM TO 5 TO 50% BY WEIGHT OF A PULVERULENT THERMAL CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA AND SILICATES; HEATING THE MIXTURE AT A TEMPERATURE OF ABOUT 180* TO 400*C. IN THE ABSENCE OF ANY PEROXIDE UNTIL A SUBSTANTIAL PROPORTION OF THE CARBOXYLIC COMPOUND IS COMBINED WITH THE OLEFIN; ADMIXING TO THE THUS OBTAINED PRODUCT A COMPOUND CAPABLE OF COMBINING WITH CARBOXYLIC GROUPS AND THEN HEATING SAID MIXTURE AT ABOUT 140* TO 180*C. UNTIL SUBSTANTIAL MODIFICATION OF THE OLEFIN IS PRODUCED.
Claim 2
Independent Claim
111 words
A METHOD FOR MODIFYING POLYOLEFINS WHICH COMPRISES THE STEPS OF: MIXING A POLYOLEFIN WITH A CARBOXYLIC COMPOUND HAVING AN UNSATURATED ALIPHATIC CHAIN; ADDING TO THE MIXTURE OBTAINED FROM TO 5 TO 50% BY WEIGHT OF A PULVERULENT THERMAL CATALYST SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA AND SILICATES; HEATING THE MIXTURE AT A TEMPERATURE OF ABOUT 180* TO 400*C. IN THE ABSENCE OF ANY PEROXIDE UNTIL A SUBSTANTIAL PROPORTION OF THE CARBOXYLIC COMPOUND IS COMBINED WITH THE OLEFIN; ADMIXING TO THE THUS OBTAINED PRODUCT A COMPOUND CAPABLE OF COMBINING WITH CARBOXYLIC GROUPS AND THEN HEATING SAID MIXTURE AT ABOUT 140* TO 180*C. UNTIL SUBSTANTIAL MODIFICATION OF THE OLEFIN IS PRODUCED.
References Cited (Backward Citations)
US2973344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |