US3645962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polyester compositions
Assignee: Hercules LLC
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Filing: 1970-02-26
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Granted: 1972-02-29
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Expires: 1990-02-26
Abstract
Abstract LINEAR SATURATED POLYESTERS AND PARTICULARLY POLY(ETHYELENE TEREPHTHALATE) WITH IMPROVED FLAME RETARDANCY ARE PROVIDED WHICH CONTAIN FROM 3 TO 15% OF A HOMOPOLYETHER OR COPOLYMER OF AN OXETANE SUBSITUTED IN THE THREE POSITION BY 1 OR 2 BROMOMETHYL GROUPS OR WITH FROM 1 TO 15% OF SAID POLYETHER AND FROM 0.5 TO 5% OF AN ANTIMONY COMPOUND.
Inventors
- 👤 Robert J Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:04
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/16; C08G65/18; C08K; C08K5/00; C08K5/04; C08K5/06; C08L101/00; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L67/00; C08L67/02; C08L67/06; C08K3/00; C08K3/01; C08K3/016; C08L2201/00; C08L2201/02; C08L71/00; Y; Y10; Y10S; Y10S260/00; Y10S260/24
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |