US4048218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant mercaptocarboxylic acid esters of halogenated aromatic polyols
Assignee: WR Grace and Co
•
Filing: 1975-02-24
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Granted: 1977-09-13
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Expires: 1995-02-24
Abstract
Abstract This invention is directed to novel halogen-containing polythiols which impart improved flame retardancy to radiation cured thiol-ene compositions.
Inventors
- 👤 Charles R. Morgan
- 👤 David E. Kramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:20
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/248; D06M13/252; C; C07; C07C; C07C323/00; C08; C08G; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08G75/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
As a composition of matter, a halogen-containing polythiol of the formula ##STR12## wherein X is a halogen selected from the group consisting of Cl and Br, and R 1 is an alkyl group containing 1-16 carbon atoms.
Claim 2
Dependent Claim
37 words
As a composition of matter, a halogen-containing polythiol of the formula ##STR12## wherein X is a halogen selected from the group consisting of Cl and Br, and R 1 is an alkyl group containing 1-16 carbon atoms.
Claim 3
Dependent Claim
6 words
As a composition of matter ##STR13##
Claim 4
Dependent Claim
6 words
As a composition of matter ##STR13##
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |