US1968797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulphuric derivative of higher alcohols
Assignee: Individual
•
Filing: 1933-01-04
•
Granted: 1934-07-31
•
Expires: 1953-01-04
Abstract
No abstract record available.
Inventors
- 👤 Bertsch Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292; A; A62; A62D; A62D1/00; A62D1/0071; B; B26; B26D; B26D7/00; B26D7/06; C; C07; C07C; C07C303/00; C07C303/24; C09; C09K; C09K23/00; C09K23/08; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1937-07-30 | 1938-01-29 | 1938-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-30 | 1942-01-29 | 1942-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-30 | 1946-01-29 | 1946-07-31 | $7700.00 | Window Closed / Lapsed |