US3717602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stamping mass for metallurgical furnaces
Assignee: Didier Werke AG
•
Filing: 1970-11-13
•
Granted: 1973-02-20
•
Expires: 1990-11-13
Abstract
Abstract A refractory stamping mass wherein essentially sand or dolomite and carbon from coal or coke and a binding agent is used for metallurgical furnaces, the improvement which consists in the addition of a phenoplast precondensate.
Inventors
- 👤 K Koch
- 👤 P Koch
- 👤 W Loorz
- 👤 H Schoppa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:12
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63448; C04B35/63472; C04B35/6348; C04B35/01; C04B35/013; C04B35/63496; C04B35/66; C21; C21B; C21B7/00; C21B7/12; C21B7/125; C04B2111/00; C04B2111/00474; C04B2111/0087; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/34; C04B2235/3418; C04B2235/70; C04B2235/96; C04B2235/9669; C04B2235/9676
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |