US1899094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of acetyl-methyl-carbinol and diacetyl
Assignee: THOMAS HERMANUS VERHAVE SENIOR
•
Filing: 1929-05-21
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Granted: 1933-02-28
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Expires: 1949-05-21
Abstract
No abstract record available.
Inventors
- 👤 Kluyver Albert Jan
- 👤 Scheffer Marinus Adrianus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:13
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/24; C12P7/26; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/828; Y10S435/842
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) | 1936-02-28 | 1936-08-29 | 1937-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-28 | 1940-08-29 | 1941-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-28 | 1944-08-29 | 1945-02-28 | $7700.00 | Window Closed / Lapsed |