Patent US3369367A successfully refreshed from Google Patents.
US3369367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain tile structure
Assignee: SAAD
•
Filing: 1966-02-02
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Granted: 1968-02-20
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Expires: 1986-02-02
Abstract
No abstract record available.
Inventors
- 👤 Oscar C Saad
- 👤 James T Otenbaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:03
CPC Classifications
E; E03; E03F; E03F1/00; E03F1/002; E03F1/003; C; C02; C02F; C02F3/00; C02F3/02; C02F3/10; Y; Y02; Y02W; Y02W10/00; Y02W10/10
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |