US3833540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane plastic compositions containing halogenated aryl compounds as flame retardants
Assignee: Velsicol Chemical LLC
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Filing: 1973-02-08
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Granted: 1974-09-03
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Expires: 1993-02-08
Abstract
Abstract PLASTIC COMPOSITIONS CONTAINING POLYURTHANES AND HALOGENATED ARYL COMPOUNDS HAVING THE FORMULA ((A)I,(Z)M-PHENYL)-M-R-M''-((A)I'',(Z)M''-PHENYL) WHEREIN Z IS BROMINE OR CHLORINE, M AND M'' ARE INTEGERS HAVING A VALUE OF 1-5, I AND I'' ARE INTEGERS HAVIG A VALUE OF 0-2, R IS HEREIN DEFINED, M AND M'' ARE EACH INDEPENDENT AND ARE FROM THE GROUP OXYGEN, NITROGEN OR SULFUR WITH THE PROVISO THAT M AND M'' CANNOT CONCURRENTLY BE OXYGEN IN BOTH CASES, AND A IS CHLORINE, CYANO, NITRO, LOWER ALKOXY, LOWER ALKYL, FLUORINE, DIALKYLANINO, PHENYL, HALO-PHENYL, BENZYL, OR HALO-BENZYL.
Inventors
- 👤 A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:23
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/36; B01J8/38; B01J8/382; C08K5/04; C08K5/06; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |