Patent US4052526A successfully refreshed from Google Patents.
US4052526A
Expired / Lapsed
US
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Intumescent fire retardant material and article
Assignee: General Electric Co
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Filing: 1976-05-17
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Granted: 1977-10-04
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Expires: 1996-05-17
Abstract
Abstract A silicone resin base fire retardant system having a temperature capability at least to about 450° F (230° C) combines intumescent characteristics with a crusting and charring capability through use of a combination of an oxide of iron and a phosphate of potassium for crusting, along with a charring material such as tripentaerythritol and a blowing agent, such as melamine, in a silicone resin base to allow for adequate expansion.
Inventors
- 👤 Richard D. Pratt
- 👤 Paul F. Proffitt
- 👤 George Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:36
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C09; C09D; C09D183/00; C09D183/04; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/907; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31678
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A metallic article of manufacture including a metallic surface having bonded thereto an improved silicone-base intumescent fire retardant material comprising a mixture of: 35-75 parts by weight of a silicone resin; and 22-112 parts by weight of a mixture of ingredients comprising, by weight: 1-10 parts of an oxide of iron; 17-52 parts of a phosphate of potassium; 2-30 parts of a charring material; and 2-20 parts of a blowing agent.
Claim 2
Dependent Claim
71 words
A metallic article of manufacture including a metallic surface having bonded thereto an improved silicone-base intumescent fire retardant material comprising a mixture of: 35-75 parts by weight of a silicone resin; and 22-112 parts by weight of a mixture of ingredients comprising, by weight: 1-10 parts of an oxide of iron; 17-52 parts of a phosphate of potassium; 2-30 parts of a charring material; and 2-20 parts of a blowing agent.
Claim 3
Dependent Claim
29 words
The article of claim 1 in which the surface is a metallic material based on an element selected from the group consisting of Al, Mg, Ti and their alloys.
Claim 4
Dependent Claim
29 words
The article of claim 1 in which the mixture of ingredients comprises, by weight: 2-4 parts ferric oxide; 35-40 parts potassium orthophosphate; 15-25 parts tripentaerythritol; and 6-9 parts melamine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |