US3574148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular polyurethane plastics
Assignee: Bayer AG
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Filing: 1969-03-04
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Granted: 1971-04-06
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Expires: 1989-03-04
Abstract
Abstract CELLULAR POLYURETHANE PLASTICS HAVING IMPROVED FLAME RESISTANCE WHICH CONTAIN AN OPEN CHAIN OR CYCLIC ORGANIC ESTER OF AN ACID OFHEXAVALENT SULPHUR AND A BROMIDE OR IODIDE OF AN ALKALI METAL OR AN ALKALINE EARTH METAL, LITHIUM CHLORIDE, CALCIUM CHLORIDE OR MAGNESIUM CHLORIDE WHEREIN THE ORGANIC ESTER CONTAINS NO HYDROGEN ATOMS WHICH ARE REACTIVE WITH NCO GROUPS.
Inventors
- 👤 Erwin Windemuth
- 👤 Gerhard Grogler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:13
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6688; C08K; C08K3/00; C08K3/16; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C08J2375/00; C08J2375/04
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |