Patent US1678633A successfully refreshed from Google Patents.
US1678633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting pipe
Assignee: CENTRIFUGAL PIPE Corp
•
Filing: 1924-12-10
•
Granted: 1928-07-31
•
Expires: 1944-12-10
Abstract
No abstract record available.
Inventors
- 👤 Burchartz Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:35
CPC Classifications
B; B22; B22D; B22D13/00; B22D13/10; B22D13/101; B22D13/104
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1931-07-31 | 1932-01-30 | 1932-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-07-31 | 1936-01-30 | 1936-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-07-31 | 1940-01-30 | 1940-07-31 | $7700.00 | Window Closed / Lapsed |