US2208143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating calcareous materials
Assignee: Riverside Cement Co
•
Filing: 1937-08-10
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Granted: 1940-07-16
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Expires: 1957-08-10
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Weinig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:12
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/001; B03D1/004; B03D1/006; B03D1/008; B03D1/012; B03D2201/00; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04
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) | 1943-07-16 | 1944-01-15 | 1944-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-16 | 1948-01-15 | 1948-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-16 | 1952-01-15 | 1952-07-16 | $7700.00 | Window Closed / Lapsed |