US2352435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic sulphur compound and a process for its preparation
Assignee: Shell Development Co
•
Filing: 1940-05-25
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Granted: 1944-06-27
•
Expires: 1960-05-25
Abstract
No abstract record available.
Inventors
- 👤 Hoeffelman Johan Marius
- 👤 Berkenbosch Rinke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:46
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/14; C07C319/16; C07C319/18; C07C2601/00; C07C2601/12; C07C2601/14
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) | 1947-06-27 | 1947-12-27 | 1948-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-06-27 | 1951-12-27 | 1952-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-06-27 | 1955-12-27 | 1956-06-27 | $7700.00 | Window Closed / Lapsed |