Patent US3250749A successfully refreshed from Google Patents.
US3250749A
Expired / Lapsed
US
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Blended chlorinated aromatic polyisocyanates useful for polyurethane preparation
Assignee: FMC Corp
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Filing: 1962-06-13
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Granted: 1966-05-10
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Expires: 1982-06-13
Abstract
No abstract record available.
Inventors
- 👤 Clifford A Erickson
- 👤 Warren Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:20
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/14; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/46; C08G18/4684; C08G18/48; C08G18/50; C08G18/5003; C08G18/5006; C08G18/5009; C08G18/5075; C08G18/5081; C08G18/5084; C08G18/70; C08G18/72; C08G18/77; C08G18/773; C09; C09D; C09D175/00; C09D175/04; C08G2101/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A BLEND OF PHENYLENE DIISOCYANATES WHICH COMPRISES, BY WEIGHT, 25-40% TETRACHLORO-M-PHENYLENE DIISOCYANATE, 25-40% TRICHLORO-M-PHENYLENE DIISOCYANATE AND 20-50% PHENYLENE DIISOCYANATE SELECTED FROM THE GROUP CONSISTING OF DICHLORO-M-PHENYLENE DIISOCYANTE, MONOCHLOROM-PHENYLENE DIISOCYANATE AND M-PHENYLENE DIISOCYANATE, THE SUM OF SAID COMPONENTS BEING 100% OF THE BLEND, SAID BLEND CONTAINING 25-42% CHLORINE, BY WEIGHT, AND BEING CAPABLE OF EXISTING AS A LIQUID AT 25*C.
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |