US3639455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydroxyethylenecarbamate ethers
Assignee: BASF SE
•
Filing: 1968-07-31
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Granted: 1972-02-01
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Expires: 1988-07-31
Abstract
Abstract PRODUCTION OF HYDROXYETHYLENECARBAMATE ETHERS BY THE REACTION OF ETHYLENE GLYCOL MONOETHERS WITH UREA IN THE PRESENCE OF NICKEL SALTS. THE PRODUCTS ARE VALUABLE STARTING MATERIALS FOR THE PRODUCTION OF TEXTILE FINISHES.
Inventors
- 👤 Harro Petersen
- 👤 Klaus-Christian Renner
- 👤 Hans Diem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:09
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 0
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |