Patent US3914513A successfully refreshed from Google Patents.
US3914513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substrates coated with fire resistant compositions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-11-20
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Granted: 1975-10-21
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Expires: 1993-11-20
Abstract
Abstract A coated product comprising a flammable substrate coated with a mixture of (1) a polyolefin selected from the group consisting of polyethylene and polypropylene, (2) from 10-20% by weight of a flame retardant additive comprising a mixture of chlorinated paraffin wax and antimony oxide and (3) from 40-45% by weight of an intumescent material comprising a mixture of pentaerythritol polyurethane with melamine phosphate, the mixture being selfextinguishing and free from drip of molten polyolefin when a direct flame is applied thereto.
Inventors
- 👤 Alistair Chalmers Ramsay Brown
- 👤 Denis George Harold Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:33
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/34; C; C09; C09D; C09D5/00; C09D5/18; C09D5/185; D21H17/00; D21H17/71; D21H17/74; D21H5/00; D21H5/0002; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/907; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31587; Y10T428/31591; Y10T428/31609; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
A COATED PRODUCT COMPRISING A FLAMMABLE SUBSTRATE COATED WITH A MIXTURE OF (1) POLYOLEIN SELECTED FROM THE GROUP CONSISTING OF POLYETHELENE AND POLYPROPYLENE (2) FROM 10-20% BY WEIGHT OF A FLAME RETARDANT ADDITIVE COMPRISING A MIXTURE OF CHLORINATED PARIFFIN WAX AND ANTIMONY OXIDE AND (3) FROM 40-45% BY WEIGHT OF AN INTUMESCENT MATERIAL COMPRISING A MIXTURE OF PENTAERYTHRITOL POLYURETHANE WITH MELAMINE PHOSPATE, SAID MIXTURE BEING SELF-EXTINGUISHING AND FREE FROM DRIP OF MOLTON POLYOLEFIN WHEN A DIRECT FLAME IS APPLIED THERETO.
Claim 2
Dependent Claim
80 words
A COATED PRODUCT COMPRISING A FLAMMABLE SUBSTRATE COATED WITH A MIXTURE OF (1) POLYOLEIN SELECTED FROM THE GROUP CONSISTING OF POLYETHELENE AND POLYPROPYLENE (2) FROM 10-20% BY WEIGHT OF A FLAME RETARDANT ADDITIVE COMPRISING A MIXTURE OF CHLORINATED PARIFFIN WAX AND ANTIMONY OXIDE AND (3) FROM 40-45% BY WEIGHT OF AN INTUMESCENT MATERIAL COMPRISING A MIXTURE OF PENTAERYTHRITOL POLYURETHANE WITH MELAMINE PHOSPATE, SAID MIXTURE BEING SELF-EXTINGUISHING AND FREE FROM DRIP OF MOLTON POLYOLEFIN WHEN A DIRECT FLAME IS APPLIED THERETO.
Claim 3
Dependent Claim
13 words
A coated product according to claim 1 comprising paper coated with said composition.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |