US2943075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styrene-modified rubbery compositions and stabilized with 2-nitrophenols
Assignee: Dow Chemical Co
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Filing: 1956-07-02
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Granted: 1960-06-28
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Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Jr William K Schweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A COMPOSITION OF MATTER THE ESSENTIAL CONSTITUENTS OF WHICH ARE A POLYMERIC COMPOSITION OBTAINED BY POLYMERIZING FROM 85 TO 95 PERCENT BY WEIGHT OF STYRENE IN THE PRESENCE OF FROM 15 TO 5 PERCENT BY WEIGHT OF A STYRENE-SOLUBLE RUBBERY COPOLYMER OF BUTADIENE AND STYRENE, AND AS A STABILIZING AGENT FOR THE POLYMER, FROM 0.5 TO 5 PERCENT BY WEIGHT OF A 2-NITROPHENOL HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
67 words
A COMPOSITION OF MATTER THE ESSENTIAL CONSTITUENTS OF WHICH ARE A POLYMERIC COMPOSITION OBTAINED BY POLYMERIZING FROM 85 TO 95 PERCENT BY WEIGHT OF STYRENE IN THE PRESENCE OF FROM 15 TO 5 PERCENT BY WEIGHT OF A STYRENE-SOLUBLE RUBBERY COPOLYMER OF BUTADIENE AND STYRENE, AND AS A STABILIZING AGENT FOR THE POLYMER, FROM 0.5 TO 5 PERCENT BY WEIGHT OF A 2-NITROPHENOL HAVING THE GENERAL FORMULA:
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |