Patent US3373440A successfully refreshed from Google Patents.
US3373440A
Expired / Lapsed
US
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Apparatus for photographing well core samples
Assignee: Core Laboratories Inc
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Filing: 1966-02-01
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Granted: 1968-03-12
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Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Jenkins
- 👤 Harold T Barnaby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:49
CPC Classifications
E; E21; E21B; E21B49/00; G; G03; G03B; G03B15/00
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |