US2221175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pelletized portland cement
Assignee: CalPortland Co
•
Filing: 1938-01-17
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Granted: 1940-11-12
•
Expires: 1958-01-17
Abstract
No abstract record available.
Inventors
- 👤 Ira C Bechtold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:54
CPC Classifications
C; C04; C04B; C04B40/00; C04B40/06; C04B7/00; C04B7/36; C04B7/38; C04B7/40; C04B7/48; C04B7/52; C04B7/522; C04B7/525; Y; Y10; Y10S; Y10S425/00; Y10S425/101
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) | 1943-11-12 | 1944-05-13 | 1944-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-12 | 1948-05-13 | 1948-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-12 | 1952-05-13 | 1952-11-12 | $7700.00 | Window Closed / Lapsed |