US2850490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizable and vulcanized products from polyethylene and process for their production
Assignee: Phillips Petroleum Co
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Filing: 1954-07-12
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Granted: 1958-09-02
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Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 Peter J Canterino
- 👤 Vault Albert N De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:36
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS WHICH COMPRISES REACTING A NORMALLY SOLID POLYMER OF AN ALIPHATIC OLEFIN WITH A HALOGENATING AGENT AT A TEMPERATURE UN THE RANGE OF 150*C. TO 300* C. F OR A PERIOD OF 1 TO 3 HOURS, EFFECTING HALOGENATION AND AT LEAST PARTIAL DEHALOGENATIIN WITH REMOVAL OF HYDROGEN HALIDE IN SUBSTANTIALLY A SINGLE STEP, THE DEHALOGENATION BEING EF FECTED AT A TEMPERATURE OF AT LEAST 175* C. AND WITHIN SAID RANGE, REGULATING REACTION CONDITIONS OF TEMPERATURE AND TIME TO PROVIDE A PRODUCT HAVING AN UNSATURATION OF FROM 2 TO 15 PERCENT AND A COMBINED HALOGEN CONTENT NOT EXCEEDING 10 PERCENT BY WEIGHT AND RECOVERING THE RESULTING HALOGENATED PRODUCT.
Claim 2
Dependent Claim
108 words
A PROCESS WHICH COMPRISES REACTING A NORMALLY SOLID POLYMER OF AN ALIPHATIC OLEFIN WITH A HALOGENATING AGENT AT A TEMPERATURE UN THE RANGE OF 150*C. TO 300* C. F OR A PERIOD OF 1 TO 3 HOURS, EFFECTING HALOGENATION AND AT LEAST PARTIAL DEHALOGENATIIN WITH REMOVAL OF HYDROGEN HALIDE IN SUBSTANTIALLY A SINGLE STEP, THE DEHALOGENATION BEING EF FECTED AT A TEMPERATURE OF AT LEAST 175* C. AND WITHIN SAID RANGE, REGULATING REACTION CONDITIONS OF TEMPERATURE AND TIME TO PROVIDE A PRODUCT HAVING AN UNSATURATION OF FROM 2 TO 15 PERCENT AND A COMBINED HALOGEN CONTENT NOT EXCEEDING 10 PERCENT BY WEIGHT AND RECOVERING THE RESULTING HALOGENATED PRODUCT.
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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |