US2352552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation products of urea and amines
Assignee: Individual
•
Filing: 1940-06-04
•
Granted: 1944-06-27
•
Expires: 1960-06-04
Abstract
No abstract record available.
Inventors
- 👤 Kienzle Jean Andre Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:53
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C07; C07G; C07G99/00; C14C3/08; D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/5264; D06P1/5285; D06P1/56; D06P1/655; D06P1/66; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/07
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) | 1947-06-27 | 1947-12-27 | 1948-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-06-27 | 1951-12-27 | 1952-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-06-27 | 1955-12-27 | 1956-06-27 | $7700.00 | Window Closed / Lapsed |