US1968033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and product relating to tertiary ethers
Assignee: Shell Development Co
•
Filing: 1931-12-28
•
Granted: 1934-07-31
•
Expires: 1951-12-28
Abstract
No abstract record available.
Inventors
- 👤 Evans Theodore
- 👤 Karl R Edlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:07
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C41/00; C07C41/01; C07C41/05; C07C41/06; C07C43/10; C07C43/135
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) | 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 |