Patent US2915545A successfully refreshed from Google Patents.
US2915545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorination of aromatic polyisocyanates
Assignee: FMC Corp
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Filing: 1957-03-20
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Granted: 1959-12-01
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Expires: 1977-03-20
Abstract
No abstract record available.
Inventors
- 👤 Tazuma James Junkichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:56
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE PROCESS OF PREPARING TRI AND TETRACHLORINATED AROMATIC DIISOCYANATES WHICH COMPRISES REACTING CHLORINE WITH A MELT OF AN AROMATIC DIISOCYANATE WHOSE NUCLEUS IS SELECTED FROM THE GROUP CONSISTING OF PHENYL AND NAPHTHYL, IN THE PRESENCE OF A CATALYTIC QUANTITY OF AN ANHYDROUS FERRIC HALIDE SELECTED FROM THE GROUP CONSISTING TO FERRIC CHLORIDE, FERRIC BROMIDE AND FERRIC IODIDE, MAINTAINING THE REACTION MIXTURE IN A MOLTEN STATE THROUGHOUT THE REACTION.
Claim 2
Dependent Claim
68 words
THE PROCESS OF PREPARING TRI AND TETRACHLORINATED AROMATIC DIISOCYANATES WHICH COMPRISES REACTING CHLORINE WITH A MELT OF AN AROMATIC DIISOCYANATE WHOSE NUCLEUS IS SELECTED FROM THE GROUP CONSISTING OF PHENYL AND NAPHTHYL, IN THE PRESENCE OF A CATALYTIC QUANTITY OF AN ANHYDROUS FERRIC HALIDE SELECTED FROM THE GROUP CONSISTING TO FERRIC CHLORIDE, FERRIC BROMIDE AND FERRIC IODIDE, MAINTAINING THE REACTION MIXTURE IN A MOLTEN STATE THROUGHOUT THE REACTION.
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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |