US3156532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yttrium-90 generator
Assignee: Individual
•
Filing: 1961-06-30
•
Granted: 1964-11-10
•
Expires: 1981-06-30
Abstract
No abstract record available.
Inventors
- 👤 Robert F Doering
- 👤 Walter D Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:47
CPC Classifications
G; G21; G21G; G21G1/00; G21G1/02; C; C22; C22B; C22B61/00; G21G1/04
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |