Patent US3070618A successfully refreshed from Google Patents.
US3070618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing polyisocyanates from polyamines and carbon monoxide
Assignee: Basic Research Corp
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Filing: 1958-12-15
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Granted: 1962-12-25
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Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Folsom E Drummond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:15
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/14; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS OF PRODUCING A POLYISOCYANATE WHICH COMPRISES REACTING AN AROMATIC POLYAMINE WITH A THERMALLY DECOMPOSABLE METAL CARBONYL AND OXYGEN AT A TEMPERATURE OF BETWEEN ABOUT 100*C. AND 350*C. TO CAUSE DECOMPOSITION OF SAID METAL OT CARBONYL TO RELEASE CARBON MONOXIDE AND METAL TO CATALYZE THE REACTION WITH THE FORMATION OF A REACTION PRODUCT COMPRISING POLYISOCYANATE OF SAID DIAMINE AND WATER, SAID AROMATIC POLYAMINE BEING SELECTED FROM THE GROUP CONSISTING OF METATOLYLENE DIAMINE, NAPHTHYLENE DIAMINE, AND HEATING SAID YLENE DIAMINE AND PHENYLENE DIAMINE, AND HEATING SAID REACTION PRODUCT TO VOLATILIZE SAID WATER AND RECOVERING A RESIDUE CONSISTING OF SAID POLYISOCYANATE, SAID METAL CARBONYL BEINNG SELECTED FROM THE GROUP CONSISTING OF NICKEL CARBONYL AND TITANIUM CARBONYL AND MIXTURES THEREOF.
Claim 2
Dependent Claim
118 words
A PROCESS OF PRODUCING A POLYISOCYANATE WHICH COMPRISES REACTING AN AROMATIC POLYAMINE WITH A THERMALLY DECOMPOSABLE METAL CARBONYL AND OXYGEN AT A TEMPERATURE OF BETWEEN ABOUT 100*C. AND 350*C. TO CAUSE DECOMPOSITION OF SAID METAL OT CARBONYL TO RELEASE CARBON MONOXIDE AND METAL TO CATALYZE THE REACTION WITH THE FORMATION OF A REACTION PRODUCT COMPRISING POLYISOCYANATE OF SAID DIAMINE AND WATER, SAID AROMATIC POLYAMINE BEING SELECTED FROM THE GROUP CONSISTING OF METATOLYLENE DIAMINE, NAPHTHYLENE DIAMINE, AND HEATING SAID YLENE DIAMINE AND PHENYLENE DIAMINE, AND HEATING SAID REACTION PRODUCT TO VOLATILIZE SAID WATER AND RECOVERING A RESIDUE CONSISTING OF SAID POLYISOCYANATE, SAID METAL CARBONYL BEINNG SELECTED FROM THE GROUP CONSISTING OF NICKEL CARBONYL AND TITANIUM CARBONYL AND MIXTURES THEREOF.
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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |