US3492383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing a crack resistant multi-layer furnace lining
Assignee: Sulzer AG
•
Filing: 1968-05-07
•
Granted: 1970-01-27
•
Expires: 1988-05-07
Abstract
No abstract record available.
Inventors
- 👤 Julius Heimgartner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:51
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/16; F27D1/1626; B; B22; B22D; B22D41/00; B22D41/005; B22D41/01; B22D41/02; F27B; F27B14/00; F27B14/08; F27B14/10; F27B14/06; F27B14/061
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2141600A
Cited
US832895A
Cited
US1517820A
Cited
US1917849A
Cited
US3122813A
Cited
US3252199A
Cited
US3345059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |