US3515870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray system for superimposing the image of a reference object and an x-ray image
Assignee: Keleket CGR Corp
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Filing: 1967-02-03
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Granted: 1970-06-02
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Expires: 1987-02-03
Abstract
No abstract record available.
Inventors
- 👤 Roger A Marquis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:15
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/04; G03B42/047
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) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |