US3983082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intumescent fire retardant material and article
Assignee: General Electric Co
•
Filing: 1975-02-19
•
Granted: 1976-09-28
•
Expires: 1995-02-19
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
2026-10-26 21:43
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
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 the 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
72 words
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 the 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
39 words
The material of claim 1 in which the mixture of ingredients consists essentially of, by weight: 2 - 4 parts ferric oxide; 35 - 40 parts potassium orthophosphate; 15 - 25 parts tripentaerythritol; and 6 - 9 parts melamine.
Claim 4
Dependent Claim
58 words
The material of claim 1 in which: the silicone resin is about 55 parts by weight; and, the mixture of ingredients is about 70 parts by weight of the mixture consisting essentially of, by weight: 2.5 - 3.5 parts ferric oxide; 36 - 38 parts potassium orthophosphate; 20 - 25 parts tripentaerythritol; and 7 - 8 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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |