Patent US2886235A successfully refreshed from Google Patents.
Patent US3550382A successfully refreshed from Google Patents.
US3550382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of construction of tunnel lining
Assignee: Individual
•
Filing: 1968-02-07
•
Granted: 1970-12-29
•
Expires: 1988-02-07
Abstract
No abstract record available.
Inventors
- 👤 Vladimir Alexandrovich Khodosh
- 👤 Sergei Fedorovich Salov
- 👤 Valentin Alexandrovich Ivanov
- 👤 Evstafy Andreevich Vasilenko
- 👤 Leonid Ivanovich Saveliev
- 👤 Evgeny Moiseevich Bolotin
- 👤 Leonid Konstantinovi Khaidurov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:46
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/04; E21D11/10; E21D9/00; E21D9/06; E21D9/08; E21D9/087; E21D9/0873
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |