US3361812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted urea derivatives useful as emulsifiers and as textile auxiliaries
Assignee: Sandoz AG
•
Filing: 1964-08-03
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Granted: 1968-01-02
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Expires: 1984-08-03
Abstract
No abstract record available.
Inventors
- 👤 Hofer Kurt
- 👤 Kessler Rudolf
- 👤 Sollberger Urs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:35
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C07; C07C; C07C275/00; C07C275/04; C07C275/06; C07C275/14; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32; C07D233/36; C08F2/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2254136A
Cited
US3006955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |