US2455535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Estrogenic substances
Assignee: Schieffelin and Co
•
Filing: 1945-11-10
•
Granted: 1948-12-07
•
Expires: 1965-11-10
Abstract
No abstract record available.
Inventors
- 👤 Ralph C Tallman
- 👤 Alfred H Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:44
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/69; C07C37/00; C07C37/01; C07C37/055; C07C43/00; C07C43/02; C07C43/20; C07C43/205; C07C43/2055; C07C45/62; C07C45/72; C07C45/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2317607A
Cited
US2400033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-07 | 1952-06-07 | 1952-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-07 | 1956-06-07 | 1956-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-07 | 1960-06-07 | 1960-12-07 | $7700.00 | Window Closed / Lapsed |