US2621389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertically sliding mold for molding concrete structures
Assignee: Individual
•
Filing: 1948-11-24
•
Granted: 1952-12-16
•
Expires: 1968-11-24
Abstract
No abstract record available.
Inventors
- 👤 Heidenstam Erik Johan Von
- 👤 Lindman Emrik Ivar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/06; E04G11/20; E04G11/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US908326A
Cited
US942403A
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US980020A
Cited
US1075454A
Cited
US1165586A
Cited
US1127369A
Cited
US1891160A
Cited
US2440920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |