Patent US1896811A successfully refreshed from Google Patents.
US1896811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of gluconic acid
Assignee: Pfizer Inc
•
Filing: 1930-02-03
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Granted: 1933-02-07
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Expires: 1950-02-03
Abstract
No abstract record available.
Inventors
- 👤 James N Currie
- 👤 Ralph H Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:32
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P7/58; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822
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) | 1936-02-07 | 1936-08-08 | 1937-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-07 | 1940-08-08 | 1941-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-07 | 1944-08-08 | 1945-02-07 | $7700.00 | Window Closed / Lapsed |