Patent US1452739A successfully refreshed from Google Patents.
US1452739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decolorizing and purification of saccharine materials
Assignee: Individual
•
Filing: 1919-11-04
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Granted: 1923-04-24
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Expires: 1939-11-04
Abstract
No abstract record available.
Inventors
- 👤 Hood John James
- 👤 Clark John
- 👤 Clark Percy George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:03
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/005
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) | 1926-04-23 | 1926-10-23 | 1927-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-04-23 | 1930-10-23 | 1931-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-04-23 | 1934-10-23 | 1935-04-24 | $7700.00 | Window Closed / Lapsed |