US4281069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolic foam
Assignee: Armstrong World Industries Inc
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Filing: 1980-05-14
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Granted: 1981-07-28
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Expires: 2000-05-14
Abstract
Abstract A phenolic foam produced without the use of a conventional chlorofluorocarbon or hydrocarbon blowing agent is disclosed. The phenolic foam is produced as the reaction product of a mixture comprising a phenolic resole, a surfactant and stannous chloride. The phenolic foams can be formulated to contain a substantial proportion of closed cells.
Inventors
- 👤 Thomas G. Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/04; C08J9/12; C08J9/125; C08J2361/00; C08J2361/04; C08J2361/06; C08J2491/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
A phenolic foam produced, without the use of a chlorofluorocarbon or hydrocarbon blowing agent, as the reaction product of a mixture comprising a phenolic resole, a surfactant and stannous chloride.
Claim 2
Dependent Claim
30 words
A phenolic foam produced, without the use of a chlorofluorocarbon or hydrocarbon blowing agent, as the reaction product of a mixture comprising a phenolic resole, a surfactant and stannous chloride.
Claim 3
Dependent Claim
34 words
The phenolic foam of claim 1 in which said surfactant is employed in an amount within the range of from about 0.5 to about 30 parts per 100 parts by weight of phenolic resole.
Claim 4
Dependent Claim
16 words
The phenolic foam of claim 1 in which stannous chloride is employed in its dihydrate form.
Claim 5
Dependent Claim
35 words
The phenolic foam of claim 1 in which said stannous chloride is employed in an amount within the range of from about 10 to about 26 parts per 100 parts by weight of phenolic resole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |