Patent US3784652A successfully refreshed from Google Patents.
US3784652A
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US
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Indenylphosphonates
Assignee: Great Lakes Chemical Corp
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Filing: 1972-04-19
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Granted: 1974-01-08
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Expires: 1992-04-19
Abstract
Abstract THIS INVENTION DISCLOSES NEW CHEMICAL COMPOUNDS OF THE FORMULA 1-(R''-O-P(=O)(-O-R2)-),X6-3A,4,7,7A-TETRAHYDRO- 4,7-METHANOINDENE WHEREIN X IS HALOGEN; AND R1 AND R2 ARE INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF ALKYL AND ((Y)N,(H)(5-N)-PHENYL)-(A)M- WHEREIN A IS AN ALKYLENE GROUP OF UP TO 4 CARBON ATOMS; M IS AN INTEGER FROM 0 TO 1; Y IS HALOGEN OR ALKYL; AND N IS AN INTEGER FROM 0 TO 5. THE COMPOUNDS OF THE ABOVE DESCRIPTION ARE USEFUL AS FIRE RETARDANTS.
Inventors
- 👤 J Gourse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:58
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4018; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5337
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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 |