US1657716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making cementitious material of cellular structure
Assignee: Individual
•
Filing: 1927-09-19
•
Granted: 1928-01-31
•
Expires: 1947-09-19
Abstract
No abstract record available.
Inventors
- 👤 George B Hinton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:22
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/36; C04B24/08; C04B24/085; C04B24/34; C04B38/00; C04B38/10
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) | 1931-01-30 | 1931-08-01 | 1932-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-30 | 1935-08-01 | 1936-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-30 | 1939-08-01 | 1940-01-31 | $7700.00 | Window Closed / Lapsed |