Patent US2540560A successfully refreshed from Google Patents.
Patent US2806051A successfully refreshed from Google Patents.
US2806051A
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Method for preparing urethanes by reacting urea, amines and an alcohol
Assignee: Goodrich Corp
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Filing: 1955-11-01
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Granted: 1957-09-10
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Expires: 1975-11-01
Abstract
No abstract record available.
Inventors
- 👤 Charles E Brockway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:55
CPC Classifications
A; A01; A01N; A01N47/00; A01N47/08; A01N47/10; C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD FOR PREPARING N-SUBSTITUTED URETHANES WHICH COMPRISES REACTING TOGETHER AMIXTURE COMPRISING A PRIMARY AMINE, UREA AND A MEMBER OF THE CLASS CONSISTING OF PRIMARY AND SECONDARY ALCOHOLS AT A TEMPERATURE GREATER THAN ABOUT 100*C. IN A MOLAR RATIO OF ONE MOLE OF AMINE, ONE TO TWO MOLES OF UREA AND ABOUT ONE TO ABOUT FIVE MOLES OF ALCOHOL.
Claim 2
Independent Claim
59 words
THE METHOD FOR PREPARING N-SUBSTITUTED URETHANES WHICH COMPRISES REACTING TOGETHER AMIXTURE COMPRISING A PRIMARY AMINE, UREA AND A MEMBER OF THE CLASS CONSISTING OF PRIMARY AND SECONDARY ALCOHOLS AT A TEMPERATURE GREATER THAN ABOUT 100*C. IN A MOLAR RATIO OF ONE MOLE OF AMINE, ONE TO TWO MOLES OF UREA AND ABOUT ONE TO ABOUT FIVE MOLES OF ALCOHOL.
References Cited (Backward Citations)
US2677698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |