Patent US2020385A successfully refreshed from Google Patents.
US2020385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical products
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1932-11-10
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Granted: 1935-11-12
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Expires: 1952-11-10
Abstract
No abstract record available.
Inventors
- 👤 Todd William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:22
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/12; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
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) | 1938-11-11 | 1939-05-13 | 1939-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-11 | 1943-05-13 | 1943-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-11 | 1947-05-13 | 1947-11-12 | $7700.00 | Window Closed / Lapsed |