US3008926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-combustible, phosphorus-containing condensation resins and process for their manufacture
Assignee: Hoechst AG
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Filing: 1959-02-10
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Granted: 1961-11-14
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Expires: 1979-02-10
Abstract
No abstract record available.
Inventors
- 👤 Reuter Martin
- 👤 Wolf Erhard
- 👤 Orthner Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:47
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C08G79/00; C08G79/02; C08G79/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
THE PROCESS FOR THE MANUFACTURE OF NON-COMBUSTIBLE PHOSPHORUS- AND NITROGEN-CONTAINING CONDENSATION RESINS WHEREIN A REACTION PRODUCT, OF ONE MOL OF AN EPIHALOGENOHYDRIN SELECTED FROM THE GROUP CONSISTING OF EPICHLOROHYDRIN AND EPIBROMOHYDRIN WITH TWO MOLS OF TRIHYDROXYMETHYL PHOSPHINE, IS REACTED BY HEATING TO A TEMPERATURE OF 40*-200*C. WITH A POLYMETHYLOL-MELAMINE AND AT LEAST ONE NITROGENOUS COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA, THIO-UREA, DICYANDIAMIDE, MONO- AND DI-METHYLOL DERIVATIVES OF THESE COMPOUNDS, AND MELAMINE, IN A RATIO OF ONE PART BY WEIGHT OF SAID REACTION PRODUCT AND AT LEAST 0.2 PART BY WEIGHT OF POLYMETHYLOLMELAMINE, THE COMBINED POLYMETHYLOL-MELAMINE AND NITROGENOUS COMPOUND BEING PRESENT IN AN AMOUNT UP TO 10 PARTS BY WEIGHT, SAID POLYMETHYLOL-MELAMINE BEING OBTAINED BY THE REACTION OF ONE MOL OF MELAMINE WITH 2-6 MOLS OF FORMALDEHYDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |