US3142699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urethane compounds and process therefor
Assignee: Bayer AG
•
Filing: 1959-04-15
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Granted: 1964-07-28
•
Expires: 1979-04-15
Abstract
No abstract record available.
Inventors
- 👤 Wagner Kuno
- 👤 Hertlein Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PROCESS FOR THE PREPARATION OF URETHAHE COMPOUNDS FREE OF UREA GROUPS WHICH COMPRISES REACTING AN ORGANIC ISOCYANATE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF SEMI-ACETALS AND SEMI-MERCAPTALS UNDER SUBSTANTIALLY ANYHDROUS, NON-ACID CONDITIONS AT A TEMPERATURE BELOW ABOUT 30*C.
Claim 2
Dependent Claim
41 words
A PROCESS FOR THE PREPARATION OF URETHAHE COMPOUNDS FREE OF UREA GROUPS WHICH COMPRISES REACTING AN ORGANIC ISOCYANATE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF SEMI-ACETALS AND SEMI-MERCAPTALS UNDER SUBSTANTIALLY ANYHDROUS, NON-ACID CONDITIONS AT A TEMPERATURE BELOW ABOUT 30*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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |