US3493809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high q superconductive cavity resonator made of niobium having a limited number of crystal grains
Assignee: Varian Medical Systems Inc
•
Filing: 1967-12-21
•
Granted: 1970-02-03
•
Expires: 1987-12-21
Abstract
No abstract record available.
Inventors
- 👤 Ira Weissman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:00
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H05; H05H; H05H7/00; H05H7/14; H05H7/18; H05H7/20; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/912; Y10S505/913; Y10S505/917; Y10S505/918; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2899598A
Cited
US2993143A
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 |