Patent US3697456A successfully refreshed from Google Patents.
US3697456A
Expired / Lapsed
US
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Flame-retardant polyurethane foam
Assignee: Olin Corp
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Filing: 1970-09-03
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Granted: 1972-10-10
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Expires: 1990-09-03
Abstract
Abstract IN A PROCES FOR MAKING FLAME-RETARDANT POLYURETHANE FOAM BY INCORPORATING IN THE FOAM FORMING FORMULATION A HALOGENTED ORGANIC COMPOUND AND ANTIMONY OXIDE, AN IMPROVEMENT IS DISCLOSED WHEREIN PART OF THE ANTIMONY OXIDE IS REPLACED WITH ANOTHER, LESS EXPENSIVE METAL OXIDE FROM THE GROUP CONSISTINGL OF FERRIC OXIDE, CUPRIC OXIDE, TITANIUM DIOXIDE, AND MIXTURE THEREOF.
Inventors
- 👤 James J Pitts
- 👤 Peter H Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:31
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L71/00; C08L75/00; C08L75/04; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; Y10S521/903
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |