US3159591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistant urethane foams
Assignee: Union Carbide Corp
•
Filing: 1961-06-28
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Granted: 1964-12-01
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Expires: 1981-06-28
Abstract
No abstract record available.
Inventors
- 👤 William M Lanham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:00
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A METHOD FOR THE PREPARATION OF FLAME-RESISTANT POLYURETHANE FOAMS IN WHICH A MIXTURE CONSISTING ESSENTIALLY OF A POLYETHER HAVING AT LEAST TWO ACTIVE HYDROGENS, A CATALYST, AN ORGANIC POLYISOCYANATE, A BLOWING AGENT AND A MINOR AMOUNT OF A PHOSPHORUS COMPOUND CORRESPONDING TO THE FORMULA:
Claim 2
Independent Claim
44 words
A METHOD FOR THE PREPARATION OF FLAME-RESISTANT POLYURETHANE FOAMS IN WHICH A MIXTURE CONSISTING ESSENTIALLY OF A POLYETHER HAVING AT LEAST TWO ACTIVE HYDROGENS, A CATALYST, AN ORGANIC POLYISOCYANATE, A BLOWING AGENT AND A MINOR AMOUNT OF A PHOSPHORUS COMPOUND CORRESPONDING TO THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |