Patent US1804389A successfully refreshed from Google Patents.
US1804389A
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US
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Delineated area
Assignee: CHADELOID CHEMICAL CO
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Filing: 1924-10-15
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Granted: 1931-05-12
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Expires: 1944-10-15
Abstract
No abstract record available.
Inventors
- 👤 Ellis Carleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:57
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/50; E01F9/553; E01F9/506; E01F9/518
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) | 1934-05-11 | 1934-11-10 | 1935-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-05-11 | 1938-11-10 | 1939-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-05-11 | 1942-11-10 | 1943-05-12 | $7700.00 | Window Closed / Lapsed |