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US2425151A
Expired / Lapsed
US
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Method of preparing air-setting refractory mortars
Assignee: Individual
•
Filing: 1943-12-02
•
Granted: 1947-08-05
•
Expires: 1963-12-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Greger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:21
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B20/00; C04B20/10; C04B20/1055
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-04 | 1951-02-03 | 1951-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-04 | 1955-02-03 | 1955-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-04 | 1959-02-03 | 1959-08-05 | $7700.00 | Window Closed / Lapsed |