US3810864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Translucent polyvinylchloride plastic composition and method for preparing same
Assignee: COOKSON MINERALS Ltd UTTOXETER ROAD MEIR STOKE-ON-TRENT ST3 7XS UNITED KINGDOM A Co OF UNITED KINGDOM
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Filing: 1972-12-27
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Granted: 1974-05-14
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Expires: 1992-12-27
Abstract
Abstract THIS INVENTION RELATES TO AN IMPROVED SUBSTANTIALLY TRANSLUCENT PLASTIC COMPOSITION HAVING ENCHANED FLAME RETARDANCY PREPARED BY ADDING TO A PLASTIC COMPOSITION A NEW COMPOSITION OF MATTER PREPARED BY REACTING ANTIMONY TRIOXIDE OR AN ANTIMONU TROXIDE GENERATING COMPOUND WITH A SUBSTRATE COMPRISING HYDROUS SILICA OR A HYDROUS ALKALI OR ALKALINE EARTH METAL SILICATE IN A WEIGHT RATIO IN THE RANGE OF FROM 1:4 TO 1:1 ON AN ANTIMONY TROXIDE:SUBSTRATE BASIS, THE REACTION BEING CARRIED OUT BY CALCINING AN ADMIXTURE OF SAID COMPOUNDS AT A TEMPERTURE WITHIN THE RANGE OF FROM 400* C. TO 550* C IN AN OXYGEN CONTAINING ATMOSPHERE.
Inventors
- 👤 W Lang
- 👤 E White
- 👤 J Schwarcz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:36
CPC Classifications
C; C01; C01B; C01B33/00; C08; C08K; C08K3/00; C08K3/34
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |