US2605285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea derivatives and their preparation
Assignee: Sharp and Dohme Inc
•
Filing: 1948-03-23
•
Granted: 1952-07-29
•
Expires: 1968-03-23
Abstract
No abstract record available.
Inventors
- 👤 Everett M Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:41
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/04; C07C275/06; C07C275/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A 1-ALKLY-3-CARBOXYALKYL UREA HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A 1-ALKLY-3-CARBOXYALKYL UREA HAVING THE FORMULA
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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |