Patent US3574149A successfully refreshed from Google Patents.
US3574149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant flexible polyurethane foams
Assignee: Aerojet Rocketdyne Holdings Inc
•
Filing: 1969-05-13
•
Granted: 1971-04-06
•
Expires: 1989-05-13
Abstract
Abstract LOW DENSITY, FLEXIBLE AND SEMIFLEXIBLE POLYETHERURETHANE FOAMS CONTAINING HALOGEN-CONTAINING POLYMERS SUCH AS POLYVINYL CHLORIDE ARE RENDERED RESISTANT TO FLAME TO THE POINT OF BEING SELF-EXTINGUISHING BY THE USE OF A MINOR AMOUNT OF A MIXTURE OF ZINC OXIDE (FRENCH PROCESS) AND ANTIMONY OXIDE.
Inventors
- 👤 John T Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:58
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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 |