Patent US2249903A successfully refreshed from Google Patents.
US2249903A
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US
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Stable aqueous solution of ascorbic acid
Assignee: Winthrop Chemical Co Inc
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Filing: 1936-01-23
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Granted: 1941-07-22
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Expires: 1956-01-23
Abstract
No abstract record available.
Inventors
- 👤 Lautenschlager Carl Ludwig
- 👤 Lindner Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:26
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/335; A61K31/365; A61K31/375; A61K47/00; A61K47/02; A61K47/06; A61K47/16; A61K47/18; A61K9/00; A61K9/0012; A61K9/0019
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) | 1944-07-21 | 1945-01-20 | 1945-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-21 | 1949-01-20 | 1949-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-21 | 1953-01-20 | 1953-07-22 | $7700.00 | Window Closed / Lapsed |