US2069185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of vanillin from waste sulphite pulp liquor
Assignee: HOWARD SMITH CHEMICALS Ltd
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Filing: 1934-12-27
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Granted: 1937-01-26
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Expires: 1954-12-27
Abstract
No abstract record available.
Inventors
- 👤 Hibbert Harold
- 👤 Jr George H Tomlinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:28
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/02; C; C07; C07C; C07C45/00; C07C45/78
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) | 1940-01-26 | 1940-07-27 | 1941-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-26 | 1944-07-27 | 1945-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-26 | 1948-07-27 | 1949-01-26 | $7700.00 | Window Closed / Lapsed |