US3084182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blocked isocyanates from still residues
Assignee: Bayer Corp
•
Filing: 1960-05-09
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Granted: 1963-04-02
•
Expires: 1980-05-09
Abstract
No abstract record available.
Inventors
- 👤 Wilbur R Mcelroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:25
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064; C08G18/8067; C08G18/721; C08G18/727
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A PROCESS FOR THE PREPAARATION OF A BLOCKED ISOCYANATE WHICH COMPRISES PHOSGENATING AN AROMATIC AMINE TO FORM A CRUDE ISOCYANATE REACTION MIX, DISTILLING SUBSTATIALLY ALL THE MONOMERIC ISOCAYNATE FROM SAID REACTION MIX, LEAVING REMAINING THEREBY A RESIDUE MATERIAL, THE IMPROVED METHOD OF RECOVERING FROM SAID RESIDUE MATERIAL BLOCKED ISOCYANATES WHICH COMPRISES REACTING SAID RESIDUE WITH AN EXCESS OF AN AROMATIC PHENOL HAVING THE FORMULA:
Claim 2
Dependent Claim
65 words
IN A PROCESS FOR THE PREPAARATION OF A BLOCKED ISOCYANATE WHICH COMPRISES PHOSGENATING AN AROMATIC AMINE TO FORM A CRUDE ISOCYANATE REACTION MIX, DISTILLING SUBSTATIALLY ALL THE MONOMERIC ISOCAYNATE FROM SAID REACTION MIX, LEAVING REMAINING THEREBY A RESIDUE MATERIAL, THE IMPROVED METHOD OF RECOVERING FROM SAID RESIDUE MATERIAL BLOCKED ISOCYANATES WHICH COMPRISES REACTING SAID RESIDUE WITH AN EXCESS OF AN AROMATIC PHENOL HAVING THE FORMULA:
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |