US3775143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing stressing cement
Assignee: Individual
•
Filing: 1972-05-17
•
Granted: 1973-11-27
•
Expires: 1992-05-17
Abstract
Abstract A stressing cement is produced by mixing 58-62% by weight of Portland cement with an expanding component taken in an amount of 38-42% by weight. The expanding component consists of calcium sulphate, calcium oxide and an aluminate-containing material such as alumina cement or calcium hydroaluminate.
Inventors
- 👤 V Mikhailov
- 👤 S Litver
- 👤 A Popov
- 👤 V Popova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:19
CPC Classifications
C; C04; C04B; C04B7/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3155526A
Cited
US3510326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |