US2036922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alginic acid and process of making same
Assignee: Kelco Co
•
Filing: 1935-01-31
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Granted: 1936-04-07
•
Expires: 1955-01-31
Abstract
No abstract record available.
Inventors
- 👤 Donald E Clark
- 👤 Harland C Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:15
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0084
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) | 1939-04-07 | 1939-10-07 | 1940-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-07 | 1943-10-07 | 1944-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-07 | 1947-10-07 | 1948-04-07 | $7700.00 | Window Closed / Lapsed |