US3737400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-extinguishable polyurethane foam
Assignee: Toyo Quality One Corp
•
Filing: 1972-03-24
•
Granted: 1973-06-05
•
Expires: 1992-03-24
Abstract
Abstract A self-extinguishable polyurethane foam loaded with a flamesuppressing agent. This agent is prepared of either one member selected from the group consisting of (NH4)2SO4, Al(OH)3.nH2O and a mixture thereof, or a combination of said one member with at least one member selected from the group consisting of KCl, K2SO4, K2O, KNO3, Ca(OH)2, Mg(OH)2 and Ba(OH)2.
Inventors
- 👤 S Kumasaka
- 👤 S Suzuki
- 👤 T Yoshino
- 👤 T Ibayashi
- 👤 T Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:05
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
25 words
A self-extinguishable polyurethane foam prepared by reaction between polyols and polyisocyanateS comprising as a flame-suppressing agent a mixture of ammonium sulfate and aluminum hydroxide hydrate.
Claim 2
Dependent Claim
38 words
A self-extinguishable polyurethane foam prepared by reaction between polyols and polyisocyanates comprising as a flame-suppressing agent ammonium sulfate together with at least one member selected from the group consisting of KCl, K2O, KNO3, Ca(OH)2, Mg(OH)2, K2SO4 and Ba(OH)2.
Claim 3
Dependent Claim
42 words
A self-extinguishable polyurethane foam prepared by reaction between polyols and polyisocyanates comprising as a flame-suppressing agent ammonium sulfate together with aluminum hydroxide hydrate and at least one member selected from the group consisting of KCl, K2O, KNO3, Ca(OH)2, Mg(OH)2, K2SO4, and Ba(OH)2.
Claim 4
Dependent Claim
24 words
Self-extinguishable polyurethane foam according to claim 1 wherein the flame-suppressing agent is 30 to 300 parts by weight per 100 parts of said polyols.
Claim 5
Dependent Claim
24 words
Self-extinguishable polyurethane foam according to claim 2 wherein the flame-suppressing agent is 30 to 300 parts by weight per 100 parts of said polyols.
Claim 6
Dependent Claim
24 words
Self-extinguishable polyurethane foam according to claim 3 wherein the flame-suppressing agent is 30 to 300 parts by weight per 100 parts of said polyols.
Claim 7
Dependent Claim
24 words
Self-extinguishable polyurethane foam according to claim 4 wherein the flame-suppressing agent is 30 to 300 parts by weight per 100 parts of said polyols.
References Cited (Backward Citations)
US3134742A
Cited
US3262894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |