US3243406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogenated phosphinopyranones as fire-retardant polymer additives
Assignee: Hooker Chemical Corp
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Filing: 1964-10-21
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Granted: 1966-03-29
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Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Sheldon B Greenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:05
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5373; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/655; C07F9/6552
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A FIRE RETARDANT POLYMERIC COMPOSITION COMPRISING A POLYMER AND FROM ABOUT ONE TO ABOUT THIRTY PERCENT BY WEIGHT OF THE POLYMER COMPOSITION OF THE PHOSPHINOPYRANONE HAVING THE STRUCTURE:
Claim 2
Dependent Claim
28 words
A FIRE RETARDANT POLYMERIC COMPOSITION COMPRISING A POLYMER AND FROM ABOUT ONE TO ABOUT THIRTY PERCENT BY WEIGHT OF THE POLYMER COMPOSITION OF THE PHOSPHINOPYRANONE HAVING THE STRUCTURE:
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |