Patent US1884620A successfully refreshed from Google Patents.
US1884620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of fabric containing cellulose esters
Assignee: Celanese Corp
•
Filing: 1928-06-27
•
Granted: 1932-10-25
•
Expires: 1948-06-27
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Camille
- 👤 Platt Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:09
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/38; D06M11/385; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/932
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) | 1935-10-25 | 1936-04-25 | 1936-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-10-25 | 1940-04-25 | 1940-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-10-25 | 1944-04-25 | 1944-10-25 | $7700.00 | Window Closed / Lapsed |