US2813902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiourea derivatives
Assignee: Novartis AG
•
Filing: 1956-04-04
•
Granted: 1957-11-19
•
Expires: 1976-04-04
Abstract
No abstract record available.
Inventors
- 👤 Margot Alfred
- 👤 Gysin Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:56
CPC Classifications
C; C07; C07C; C07C335/00; C07C335/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A THIOUREA DERIVATIVE CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
7 words
A THIOUREA DERIVATIVE CORRESPONDING TO 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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |