Patent US3821067A successfully refreshed from Google Patents.
US3821067A
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Fire retardant polyurethane compositions
Assignee: Atlantic Richfield Co
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Filing: 1973-07-05
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Granted: 1974-06-28
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Expires: 1993-07-05
Abstract
Abstract Fire retardant polyurethane compositions having good tensile and tear strength are formed comprising a liquid, hydroxyl-terminated diene polymer, a low molecular weight reinforcing polyol, an isocyanate, a filler, a fire retardant compound, and a catalyst. The resulting compositions find particular application as thixotropic polyurethane adhesive compositions applied to the underside of the primary fabric backing of tufted carpet as either a laminating adhesive, a precoat adhesive or a unitary carpet backing.
Inventors
- 👤 J Meyers
- 👤 R Taylor
- 👤 R Koncos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:57
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6576; C08G18/6582; C08G18/6588; C08G18/67; C08G18/69; C09; C09J; C09J175/00; C09J175/04; C09J175/14; D; D06; D06N; D06N7/00; D06N7/0005; D06N7/0039; D06N7/0042; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986; Y10T428/23993; Y10T428/31504; Y10T428/31551
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |