US3472036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shield for constructing tunnels
Assignee: G P IZVSKATELSKY I METROGIPROT
•
Filing: 1968-01-19
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Granted: 1969-10-14
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Expires: 1988-01-19
Abstract
No abstract record available.
Inventors
- 👤 Vladimir Alexandrovich Khodosh
- 👤 Valentin Alexandrovich Ivanov
- 👤 Sergei Fedorovich Salov
- 👤 Arkady Ivanovich Mozhaev
- 👤 Evstafy Andreevich Vasilenko
- 👤 Aliovsad Ibragim Abdulragimov
- 👤 Sergei Nikolaevich Vlasov
- 👤 Leonid Ivanovich Saveliev
- 👤 Evgeny Moiseevich Bolotin
- 👤 Leonid Konstantinovi Khaidurov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:05
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1355290A
Cited
GB443158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |