US3917642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brominated tricyclic imide flame retardants
Assignee: Cities Service Co
•
Filing: 1973-05-11
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Granted: 1975-11-04
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Expires: 1993-05-11
Abstract
Abstract Novel compounds, useful as flame retardants for normally flammable organic polymers, correspond to the formula: WHEREIN Q is methylene or oxygen, R is hydrogen or an alkyl group containing 1-5 carbons, R'' is hydrogen or methyl, R'''' is an organic group containing 1-15 carbons, and n is 0 or 1. These compounds may be prepared by synthesizing the corresponding unbrominated bisimides and subsequently brominating them.
Inventors
- 👤 Lionel T Wolford
- 👤 Jack Newcombe
- 👤 Jr Anderson O Dotson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:40
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; C08K5/3412; C08K5/3415; C08K5/3417; C09; C09K; C09K21/00; C09K21/06; C09K21/08; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
6 words
A COMPOUND CORRESPONDING TO THE FORMULA.
Claim 2
Dependent Claim
6 words
A COMPOUND CORRESPONDING TO THE FORMULA.
Claim 3
Dependent Claim
9 words
The compound of claim 1 corresponding to the formula:
Claim 4
Dependent Claim
9 words
The compound of claim 1 corresponding to the formula:
Claim 5
Dependent Claim
9 words
The compound of claim 1 corresponding to the formula:
Claim 6
Dependent Claim
9 words
The compound of claim 1 corresponding to the formula:
Claim 7
Dependent Claim
9 words
The compound of claim 1 corresponding to the formula:
References Cited (Backward Citations)
US3574230A
Cited
US3748340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |