Patent US3899453A successfully refreshed from Google Patents.
US3899453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyalkylcarbamylalkylphosphonate flame retardants for polyurethanes
Assignee: Stauffer Chemical Co
•
Filing: 1973-03-16
•
Granted: 1975-08-12
•
Expires: 1993-03-16
Abstract
Abstract The compounds described herein are hydroxyalkylcarbamylalkylphosphonates which are useful in preparing flame resistant polymer compositions. Exemplary of these compounds are bis-(hydroxyethyl) bis(hydroxyethyl)carbamylethylphosphonate and diethyl bis(hydroxyethyl)carbamylmethylphosphonate.
Inventors
- 👤 Edward N Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:02
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/3889; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5353
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
A FIRE RETARDANT POLYURETHANE RESINOUS MATERIAL WHICH COMPRISES IN ADMIXTURE A POLYISOCYANATE, A POLYOL, AND A HYDROXYALKYLCARBAMYLALKYLPHOSPHONATE FIRE RETARDANT COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
23 words
A FIRE RETARDANT POLYURETHANE RESINOUS MATERIAL WHICH COMPRISES IN ADMIXTURE A POLYISOCYANATE, A POLYOL, AND A HYDROXYALKYLCARBAMYLALKYLPHOSPHONATE FIRE RETARDANT COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
17 words
A fire retardant polyurethane resinous material as recited in claim 1 wherein said hydroxyalkylcarbamylalkylphosphonate is diethyl bis-(hydroxyethyl)carbamylmethylphosphonate.
Claim 4
Dependent Claim
17 words
A fire retardant polyurethane resinous material as recited in claim 1 wherein said hydroxyalkylcarbamylalkylphosphonate is diethyl bis-(hydroxyethyl)carbamylethylphosphonate.
Claim 5
Dependent Claim
16 words
A fire-retardant polyurethane resinous material as recited in claim 1 wherein said hydroxyalkylcarbamylalkylphosphonate is bis-(hydroxyethyl) bis-(hydroxyethyl)carbamylethylphosphonate.
References Cited (Backward Citations)
US2668800A
Cited
US3066140A
Cited
US3076010A
Cited
US3381063A
Cited
US3577270A
Cited
US3763283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |