US1978785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of textile and other materials
Assignee: Celanese Corp
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Filing: 1932-04-04
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Granted: 1934-10-30
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Expires: 1952-04-04
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Henry
- 👤 Dickie William Alexander
- 👤 Sowter Percy Frederick Combe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:15
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/05; D06M15/07; D06M15/09; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2965; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31986; Y10T442/00; Y10T442/20; Y10T442/2402
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) | 1937-10-29 | 1938-04-30 | 1938-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-29 | 1942-04-30 | 1942-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-29 | 1946-04-30 | 1946-10-30 | $7700.00 | Window Closed / Lapsed |