Patent US3509381A successfully refreshed from Google Patents.
US2542771A
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Reaction of polymeric materials with ethylene
Assignee: EIDP Inc
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Filing: 1947-04-16
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Granted: 1951-02-20
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Expires: 1967-04-16
Abstract
No abstract record available.
Inventors
- 👤 William E Hanford
- 👤 John R Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:19
CPC Classifications
C; C08; C08F; C08F251/00; C08F251/02; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/10; C07C43/11; C08B; C08B13/00; C08B3/00; C08B3/22; C08F291/00; C08L; C08L77/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
A PROCESS FOR THE MODIFICATION OF PRE-EXISTING MACROMOLECULAR POLYMERIC MATERIALS WHICH COMPRISES SUBJECTING A PRE-EXISTING POLYMERIC MATERIAL OF THE CLASS CONSISTING OF LINEAR POLYMERIC ESTERS, LINEAR POLYMERIC ETHERS, LINEAR HALOGENATED HYDROCARBON POLYMERS AND LINEAR POLYAMIDES HAVING RECURRING CARBONAMIDE GROUPS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN TO REACTION WITH ETHYLENE UNDER SUPERATMOSPHERIC PRESSURE IN THE PRESENCE OF A CATALYTIC QUANTITY OF A FREE RADICAL PRODUCING COMPOUND AS A CATALYST WHEREBY ETHYLENE BECOMES CHEMICALLY COMBINED WITH THE SAID PRE-EXISTING 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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |