US2790968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stratascope reference signal adjusting means
Assignee: Union Carbide Corp
•
Filing: 1954-08-27
•
Granted: 1957-04-30
•
Expires: 1974-08-27
Abstract
No abstract record available.
Inventors
- 👤 Cook Graham
- 👤 Frederick A Lory
- 👤 Frank W Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:43
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; E; E21; E21B; E21B47/00; E21B47/002; E21B47/0025; E21B49/00; G01V3/00; G01V3/18; G01V3/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |