US2249754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low substituted alkyl cellulose ether
Assignee: EIDP Inc
•
Filing: 1937-12-21
•
Granted: 1941-07-22
•
Expires: 1957-12-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1457; Y10T24/148
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) | 1944-07-21 | 1945-01-20 | 1945-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-21 | 1949-01-20 | 1949-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-21 | 1953-01-20 | 1953-07-22 | $7700.00 | Window Closed / Lapsed |