US3466926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for measuring strain produced by pressure of solid rock
Assignee: KONSTANTIN VLADIMIROVICH RUPPE
•
Filing: 1967-02-28
•
Granted: 1969-09-16
•
Expires: 1987-02-28
Abstract
No abstract record available.
Inventors
- 👤 Konstantin Vladimiro Ruppeneit
- 👤 Evgeny Semenovich Progozhin
- 👤 Jury Rodionovich Perkov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:10
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/006; G; G01; G01B; G01B5/00; G01B5/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2927459A
Cited
US3364737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |