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Patent US2451713A successfully refreshed from Google Patents.
US2451713A
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US
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Sewer pipe off-bearing and finishing machine
Assignee: BROWN
•
Filing: 1945-11-05
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Granted: 1948-10-19
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Expires: 1965-11-05
Abstract
No abstract record available.
Inventors
- 👤 Brown Davis
- 👤 John D Rossier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:59
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/92; B28B21/96; B28B21/965
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1610721A
Cited
US1870743A
Cited
US2032523A
Cited
US2268075A
Cited
US2291899A
Cited
US2401232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |