US3477301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for driving a working member of rotary type in a mechanized drifting shield
Assignee: Individual
•
Filing: 1967-03-01
•
Granted: 1969-11-11
•
Expires: 1987-03-01
Abstract
No abstract record available.
Inventors
- 👤 Evgeny Moiseevich Bolotin
- 👤 Lev Abramovich Blyakher
- 👤 Boris Nikolaevich Ierusalimsky
- 👤 Leonid Ivanovich Saveliev
- 👤 Vladimir Ivanovich Razmerov
- 👤 Leonid Konstantinovi Khaidurov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:06
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/1086; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1529; Y10T74/1531
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |