US1836183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of mercaptans and mercaptides
Assignee: GRAY PROCESSES Corp
•
Filing: 1927-01-11
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Granted: 1931-12-15
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Expires: 1947-01-11
Abstract
No abstract record available.
Inventors
- 👤 Philip S Nisson
- 👤 Malvin R Mandelbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:44
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/02; C07C319/04; C10; C10G; C10G25/00; C10G25/003; C10G25/02; C10G25/03; C10G25/05
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) | 1934-12-14 | 1935-06-15 | 1935-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-12-14 | 1939-06-15 | 1939-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-12-14 | 1943-06-15 | 1943-12-15 | $7700.00 | Window Closed / Lapsed |