US2938012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linking of ethylene polymers with peroxide catalyst and composition therefor
Assignee: Hercules Powder Co
•
Filing: 1958-03-07
•
Granted: 1960-05-24
•
Expires: 1978-03-07
Abstract
No abstract record available.
Inventors
- 👤 Leo J Filar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE PROCESS OF CROSS-LINKING A NORMALLY SOLID POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE AND COPOLYMERS OF ETHYLENE AND PROPYLENE WHICH COMPRISES HEATING SAID POLYMER IN THE PRESENCE OF BIS(3,4-DICHLORO-A,A-IMETHYLBENZYL) PEROXIDE TO A TEMPERATURE RANGING FROM ABOUT 270 TO 550*F., THE AMOUNT OF SAID PEROXIDE BEING FROM ABOUT 0.1 TO 20% BY WEIGHT OF THE POLYMER.
Claim 2
Dependent Claim
57 words
THE PROCESS OF CROSS-LINKING A NORMALLY SOLID POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE AND COPOLYMERS OF ETHYLENE AND PROPYLENE WHICH COMPRISES HEATING SAID POLYMER IN THE PRESENCE OF BIS(3,4-DICHLORO-A,A-IMETHYLBENZYL) PEROXIDE TO A TEMPERATURE RANGING FROM ABOUT 270 TO 550*F., THE AMOUNT OF SAID PEROXIDE BEING FROM ABOUT 0.1 TO 20% BY WEIGHT OF THE POLYMER.
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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |