US2028769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of textile or other materials
Assignee: Celanese Corp
•
Filing: 1931-05-28
•
Granted: 1936-01-28
•
Expires: 1951-05-28
Abstract
No abstract record available.
Inventors
- 👤 Ellis George Holland
- 👤 Storey Ralph Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:01
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/68; D06M11/70; D06M11/71; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2762; Y10T442/277
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) | 1939-01-27 | 1939-07-29 | 1940-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-27 | 1943-07-29 | 1944-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-27 | 1947-07-29 | 1948-01-28 | $7700.00 | Window Closed / Lapsed |