Patent US3297641A successfully refreshed from Google Patents.
US3297641A
Expired / Lapsed
US
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Process for cross-linking polyethylene
Assignee: WR Grace and Co
•
Filing: 1964-01-17
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Granted: 1967-01-10
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Expires: 1984-01-17
Abstract
No abstract record available.
Inventors
- 👤 Frank X Werber
- 👤 Razmic S Gregorian
- 👤 Jr William R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025; C08K5/56; Y; Y10; Y10S; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
THE PROCESS OF CROSS-LINKING NORMALLY SOLID POLYETHYLENE BY BLENDING SAME IN AN INERT OXYGEN-FREE ATMOSPHERE AT A TEMPERATURE ABOVE ITS SOFTENING POINT WITH 0.00015 TO 0.1 MOLE PER 100 GRAMS OF SAID POLYETHYLENE OF AN ALUMINUM ALKYL COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
41 words
THE PROCESS OF CROSS-LINKING NORMALLY SOLID POLYETHYLENE BY BLENDING SAME IN AN INERT OXYGEN-FREE ATMOSPHERE AT A TEMPERATURE ABOVE ITS SOFTENING POINT WITH 0.00015 TO 0.1 MOLE PER 100 GRAMS OF SAID POLYETHYLENE OF AN ALUMINUM ALKYL COMPOUND OF THE FORMULA
References Cited (Backward Citations)
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US2838437A
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US2973344A
Cited
US3017376A
Cited
US3245978A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |