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Patent US1209135A successfully refreshed from Google Patents.
US1209135A
Expired / Lapsed
US
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Process of making cement.
Assignee: Individual
•
Filing: 1911-01-04
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Granted: 1916-12-19
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Expires: 1931-01-04
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Eckel
- 👤 Arthur C Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:05
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/345; C04B7/3456
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) | 1919-12-19 | 1920-06-19 | 1920-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-12-19 | 1924-06-19 | 1924-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-12-19 | 1928-06-19 | 1928-12-19 | $7700.00 | Window Closed / Lapsed |