US1893522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for making cement
Assignee: Oliver United Filters Inc
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Filing: 1927-08-27
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Granted: 1933-01-10
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Expires: 1947-08-27
Abstract
No abstract record available.
Inventors
- 👤 Chauncey B Oliver
- 👤 Victor E Vallet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:20
CPC Classifications
F; F27; F27D; F27D99/00; F27D1/00; F27D1/02; F27D1/021; F27D1/022; F27D1/14; F27D1/145
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) | 1936-01-10 | 1936-07-11 | 1937-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-01-10 | 1940-07-11 | 1941-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-01-10 | 1944-07-11 | 1945-01-10 | $7700.00 | Window Closed / Lapsed |