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US1582940A
Expired / Lapsed
US
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Silver-protein preparation
Assignee: Winthrop Chemical Co Inc
•
Filing: 1922-07-11
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Granted: 1926-05-04
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Expires: 1942-07-11
Abstract
No abstract record available.
Inventors
- 👤 Taub Ludwig
- 👤 Janssen Hermann
- 👤 Wesenberg Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:54
CPC Classifications
A; A61; A61K; A61K33/00; A61K33/22
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) | 1929-05-03 | 1929-11-02 | 1930-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-05-03 | 1933-11-02 | 1934-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-05-03 | 1937-11-02 | 1938-05-04 | $7700.00 | Window Closed / Lapsed |