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US3262918A
Expired / Lapsed
US
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Phosphorus containing copolymers and method of making
Assignee: Armstrong World Industries Inc
•
Filing: 1963-09-10
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Granted: 1966-07-26
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Expires: 1983-09-10
Abstract
No abstract record available.
Inventors
- 👤 John E Herweh
- 👤 Norman L Miller
- 👤 Algirdas C Poshkus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:27
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A FLAME-RETARDANT COPOLYMERIC THERMOPLASTIC RESIN CONTAINING PHOSPHORUS INCORPORATED IN THE COPOLYMER MOLECULES, SAID RESIN BEING OBTAINED BY REACTING A (METHYL VINYL ETHER/MALERIC ANHYDRIDE) COPOLYMER HAVING RECURRING STRUCTURAL UNITS OF THE FORMULA
Claim 2
Dependent Claim
29 words
A FLAME RETARDANT COPOLYMERIC RESIN CONTAINING PHOSPHORUS INCORPORATED IN THE COPOLYMERIC MOLECULES, SAID RESIN BEING OBTAINED BY REACTING A STYRENE-MALEIC ANHYDRIDE COPOLYMER HAVING RECURRING STRUCTURAL UNITS OF THE FORMULA
References Cited (Backward Citations)
US3196190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |