US1350820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl ether of starches and similar carbohydrates and method of producing the same
Assignee: Chemical Foundation Inc
•
Filing: 1914-02-16
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Granted: 1920-08-24
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Expires: 1934-02-16
Abstract
No abstract record available.
Inventors
- 👤 Lilienfeld Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:28
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/10
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) | 1923-08-24 | 1924-02-23 | 1924-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-08-24 | 1928-02-23 | 1928-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-08-24 | 1932-02-23 | 1932-08-24 | $7700.00 | Window Closed / Lapsed |