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Patent US2800700A successfully refreshed from Google Patents.
US2800700A
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US
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Concrete drain tile machine
Assignee: Individual
•
Filing: 1953-11-06
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Granted: 1957-07-30
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Expires: 1973-11-06
Abstract
No abstract record available.
Inventors
- 👤 Charles D Clement
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:58
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)
US968360A
Cited
US1047419A
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US1081399A
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US1504834A
Cited
US1473969A
Cited
US1510220A
Cited
US2544453A
Cited
US2864830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |