Patent US4419460A successfully refreshed from Google Patents.
US4419460A
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US
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Phenolic foams
Assignee: Solutia Inc
•
Filing: 1981-07-06
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Granted: 1983-12-06
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Expires: 2001-07-06
Abstract
Abstract The closed cell content of a phenolic is significantly increased by the incorporation therein of a finely divided hydrated alumina.
Inventors
- 👤 Stanley S. Ho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:12
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J2361/00; C08J2361/04; C08J2361/06; C08J2361/08; C08J2361/10; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
A foam composition having a density of 0.032 to 0.064 grams/cubic centimeter and a closed cell content of at least 50% comprising a resole with a formaldehyde to phenol mole ratio of from 1.2 to 2.5:1 and from 2 to 15% by weight, based on the resole weight, of finely divided hydrated alumina.
Claim 2
Dependent Claim
53 words
A foam composition having a density of 0.032 to 0.064 grams/cubic centimeter and a closed cell content of at least 50% comprising a resole with a formaldehyde to phenol mole ratio of from 1.2 to 2.5:1 and from 2 to 15% by weight, based on the resole weight, of finely divided hydrated alumina.
Claim 3
Dependent Claim
16 words
A foam composition according to claim 1 which has been blown using a fluorocarbon blowing agent.
Claim 4
Dependent Claim
24 words
A foam composition according to claim 1 in which the weight proportion of hydrated alumina is from 5 to 10% of the resole weight.
Claim 5
Dependent Claim
17 words
A foam composition according to claim 1 with a closed cell content of from 70 to 95%.
References Cited (Backward Citations)
US3615415A
Cited
US3615414A
Cited
US3615396A
Cited
US3615418A
Cited
US3692706A
Cited
US3679408A
Cited
US3740358A
Cited
US3973962A
Cited
US4237236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |