US3784509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant compositions
Assignee: Cities Service Co
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Filing: 1971-09-24
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Granted: 1974-01-08
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Expires: 1991-09-24
Abstract
Abstract FIRE RETARDING AGENTS HAVING THE STRUCTURE OF SUBSTITUTED IMIDES, WITH THE IMIDE PORTION DERIVED FROM A HALOGENATED DIELS-ALDER ADDUCT OF AN UNSATURATED CARBOXYLIC COMPOUND SUCH AS MALECI ANHYDRIDE AND A DIENE SUCH AS CYCLOPENTADIENE AND THE SUBSTITUENT GROUP ON THE NITROGEN BEING ALKYL OR AROMATIC, ARE USEFUL IN FLAME RETARDANT PLASTIC COMPOSITIONS.
Inventors
- 👤 A Dotson
- 👤 J Newcombe
- 👤 L Wolford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:23
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D209/56; C07D209/58; C07D209/72; C07D209/76; C08; C08K; C08K5/00; C08K5/16; C08K5/34
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |