US3917547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic-inorganic foamed foam
Assignee: Phoenix Corp
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Filing: 1974-01-14
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Granted: 1975-11-04
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Expires: 1994-01-14
Abstract
Abstract The invention relates to compositions of matter in which certain inorganic particles contained in flyash are added to foamed flexible polymeric compositions to improve and extend their physical characteristics. More specifically, cenospheres (irregular-shaped, glass-like, hollow particles derived from flyash), are added to various foams, especially flexible polyurethane.
Inventors
- 👤 David H Massey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:37
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/35; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/903; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249974; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
A COMPOSITION OF MATTER COMPRISING A FLEXIBLE POLYURETHANE FOAM HAVING IMPROVED COMPRESSION STRENGTH PRODUCED BY INCORPORATION OF CENOSPHERES FROM FLYASH INTO A POLYURETHANE FOAM FORMING COMPOSITION.
Claim 2
Dependent Claim
26 words
A COMPOSITION OF MATTER COMPRISING A FLEXIBLE POLYURETHANE FOAM HAVING IMPROVED COMPRESSION STRENGTH PRODUCED BY INCORPORATION OF CENOSPHERES FROM FLYASH INTO A POLYURETHANE FOAM FORMING COMPOSITION.
Claim 3
Dependent Claim
20 words
The composition of claim 1 in which the improved polyurethane foam contains between 5 and 75 percent by volume cenospheres.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |