US3382815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of constructing railway track
Assignee: Japan National Railways
•
Filing: 1967-02-07
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Granted: 1968-05-14
•
Expires: 1987-02-07
Abstract
No abstract record available.
Inventors
- 👤 Higuchi Yoshiro
- 👤 Sato Yutaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:13
CPC Classifications
E; E01; E01B; E01B29/00; E01B29/005; E01B1/00; E01B1/002; E01B2/00; E01B2/003; E01B3/00; E01B3/28; E01B3/38; E01B1/001; E01B2204/00; E01B2204/10; E01B2204/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3146729A
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 |