US2671077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus-containing polymers
Assignee: EIDP Inc
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Filing: 1951-08-07
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Granted: 1954-03-02
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Expires: 1971-08-07
Abstract
No abstract record available.
Inventors
- 👤 William B Mccormack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:53
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE PROCESS OF PREPARING A PHOSPHORUS-CONTAINING INTERPOLYMER WHICH COMPRISES CONTACTING AN OLEFINICALLY UNSATURATED COMPOUND CONTAINING THE RADICAL CH2=C<, SELECTED FROM THE GROUP CONSISTING OF STYRENE, ACRYLONITRILE, THE LOWER ALKYL ALLYL ETHERS, AND THE LOWER ALKYL ESTERS OF ACRYLIC AND OF METHACRYLIC ACIDS, WITH A MONO-SUBSTITUTED DIHALOPHOSPHINE HAVING THE FORMULA RPX2 IN WHICH R REPRESENTS A MEMBER OF THE GROUP CONSISTING OF ALKYL, ARYL AND ARALKYL RADICALS AND X REPRESENTS A MEMBER OF THE GROUP CONSISTING OF CHLORINE AND BROMINE, IN THE PRESENCE OF A FREE RADICAL POLYMERIZATION CATALYST AND IN THE ABSENCE OF SUBSTANTIAL AMOUNTS OF HYDROXYL-CONTAINING COMPOUNDS.
Claim 2
Dependent Claim
98 words
THE PROCESS OF PREPARING A PHOSPHORUS-CONTAINING INTERPOLYMER WHICH COMPRISES CONTACTING AN OLEFINICALLY UNSATURATED COMPOUND CONTAINING THE RADICAL CH2=C<, SELECTED FROM THE GROUP CONSISTING OF STYRENE, ACRYLONITRILE, THE LOWER ALKYL ALLYL ETHERS, AND THE LOWER ALKYL ESTERS OF ACRYLIC AND OF METHACRYLIC ACIDS, WITH A MONO-SUBSTITUTED DIHALOPHOSPHINE HAVING THE FORMULA RPX2 IN WHICH R REPRESENTS A MEMBER OF THE GROUP CONSISTING OF ALKYL, ARYL AND ARALKYL RADICALS AND X REPRESENTS A MEMBER OF THE GROUP CONSISTING OF CHLORINE AND BROMINE, IN THE PRESENCE OF A FREE RADICAL POLYMERIZATION CATALYST AND IN THE ABSENCE OF SUBSTANTIAL AMOUNTS OF HYDROXYL-CONTAINING COMPOUNDS.
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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |