US3233414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain field tile
Assignee: Individual
•
Filing: 1962-12-28
•
Granted: 1966-02-08
•
Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert A Hansen
- 👤 Doris C Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:07
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US728088A
Cited
DE366700C
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US1654925A
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US1483689A
Cited
GB280242A
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GB431309A
Cited
GB436326A
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US2067356A
Cited
US2051727A
Cited
US2795542A
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US2874844A
Cited
US3091087A
Cited
US3060693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |