US2031529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of mercaptans
Assignee: Henkel AG and Co KGaA
•
Filing: 1933-03-14
•
Granted: 1936-02-18
•
Expires: 1953-03-14
Abstract
No abstract record available.
Inventors
- 👤 Elbel Eberhard
- 👤 Kirstahler Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/02; C07C319/06
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) | 1939-02-17 | 1939-08-19 | 1940-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-02-17 | 1943-08-19 | 1944-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-02-17 | 1947-08-19 | 1948-02-18 | $7700.00 | Window Closed / Lapsed |