Patent US2658877A successfully refreshed from Google Patents.
US2658877A
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Self-extinguishing alkenylbenzene copolymer composition
Assignee: Dow Chemical Co
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Filing: 1952-02-09
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Granted: 1953-11-10
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Expires: 1972-02-09
Abstract
No abstract record available.
Inventors
- 👤 Robert R Dreisbach
- 👤 George B Sterling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:14
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0019; C08K; C08K5/00; C08K5/02; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/08; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
48 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF (A) FROM 95 TO 97 PER CENT BY WEIGHT OF A COPOLYMER OF FROM 75 TO 90 PER CENT STYRENE AND CORRESPONDINGLY FROM 25 TO 10 PER CENT A-METHYLSTYRENE AND (B) FROM 5 TO 3 PER CENT BY WEIGHT OF 1,2,3,4-TETRABROMOBUTANE.
Claim 2
Dependent Claim
48 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF (A) FROM 95 TO 97 PER CENT BY WEIGHT OF A COPOLYMER OF FROM 75 TO 90 PER CENT STYRENE AND CORRESPONDINGLY FROM 25 TO 10 PER CENT A-METHYLSTYRENE AND (B) FROM 5 TO 3 PER CENT BY WEIGHT OF 1,2,3,4-TETRABROMOBUTANE.
Claim 3
Dependent Claim
13 words
A SELF-EXTINGUISHING EXPANDED CELLULAR FOAM WHOSE COMPOSITION IS THAT CLAIMED IN CLAIM 1.
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) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |