US3550389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for erecting monolithic concrete lining of underground excavations
Assignee: Individual
•
Filing: 1968-02-16
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Granted: 1970-12-29
•
Expires: 1988-02-16
Abstract
No abstract record available.
Inventors
- 👤 Vladimir Alexandrovich Khodosh
- 👤 Sergei Fedorovich Salov
- 👤 Valentin Alexandrovich Ivanov
- 👤 Evstafy Andreevich Vasilenko
- 👤 Budu Pavlovich Pachulia
- 👤 Abesalom Iosifovich Kurashvili
- 👤 Evgeny Moiseevich Bolotin
- 👤 Leonid Konstantinovi Khaidurov
- 👤 Irakly Shalvovich Machavariani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:42
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/06; E21D9/0607
Claims Analysis
Total Claims: 0
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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 |