US3382680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed concrete pile sections
Assignee: Nippon Concrete Industries Co Ltd
•
Filing: 1965-09-21
•
Granted: 1968-05-14
•
Expires: 1985-09-21
Abstract
No abstract record available.
Inventors
- 👤 Takano Tamio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:23
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/22; E02D5/52; E02D5/523; E02D5/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR954816A
Cited
US1715791A
Cited
US2168459A
Cited
US2698520A
Cited
US3111965A
Cited
US3046749A
Cited
GB942565A
Cited
US3248888A
Cited
US3255558A
Cited
US3213629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |