Patent US5629610A successfully refreshed from Google Patents.
Patent US2661518A successfully refreshed from Google Patents.
US2661518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete mold molding process
Assignee: Individual
•
Filing: 1951-09-18
•
Granted: 1953-12-08
•
Expires: 1971-09-18
Abstract
No abstract record available.
Inventors
- 👤 Henry L Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/08
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) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |