Patent US2611941A successfully refreshed from Google Patents.
US2611941A
Expired / Lapsed
US
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Apparatus for the extrusion molding of concrete and like materials
Assignee: Individual
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Filing: 1949-11-25
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Granted: 1952-09-30
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Leitl George Johann Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:55
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/52; B28B3/00; B28B3/20; B28B3/22; B28B3/26; B28B3/2645
Claims Analysis
Total Claims: 0
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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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |