US3493514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioisotope-containing microspheres
Assignee: WR Grace and Co
•
Filing: 1967-06-20
•
Granted: 1970-02-03
•
Expires: 1987-06-20
Abstract
No abstract record available.
Inventors
- 👤 George E Ashby
- 👤 Adolfo Maccragh
- 👤 Jean G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:49
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3145181A
Cited
US3303140A
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US3329817A
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US3334050A
Cited
US3360477A
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US3340202A
Cited
US3320177A
Cited
US3320178A
Cited
US3331785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |