Patent US2641818A successfully refreshed from Google Patents.
US2641818A
Expired / Lapsed
US
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Apparatus for molding concrete pipe
Assignee: Individual
•
Filing: 1948-09-04
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Granted: 1953-06-16
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Expires: 1968-09-04
Abstract
No abstract record available.
Inventors
- 👤 Hector X Eschenbrenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:36
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/22; B28B21/24; B28B21/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US811297A
Cited
US1047419A
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US1144863A
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AU208526A
Cited
US1629922A
Cited
US2267508A
Cited
US2497174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |