US3795637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-proofing agents for polyurethanes
Assignee: Knapsack AG
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Filing: 1972-04-26
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Granted: 1974-03-05
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Expires: 1992-04-26
Abstract
Abstract POLYURETHANES OR POLYURETHANE FOAM PLASTICS ARE RENDERED FIREPROOF BY MEANS OF A BLEND OF FIRE-PROOFING AGENTS COMPRISING AN AMMONIUM POLYPHOSPHATE COMPONENT AND A TRIS-(HALOGENOALKYL)-PHOSPHATE COMPONENT HAVING FROM 1 TO 4 CARBON ATOMS IN THE ALKYL GROUP, THE TRIS-(HALOGENOALKYL)-PHOSPHATE COMPONENT PREFERABLY IS TRIS-(B-CHLOROETHYL)-PHOSPHATE.
Inventors
- 👤 J Kandler
- 👤 F Dany
- 👤 K Komorniczyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08K; C08K3/00; C08K3/32; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08L; C08L75/00; C08L75/04; C08L85/00; C08L85/02; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 0
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |