US2467730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum seal for wave guides
Assignee: Westinghouse Electric Corp
•
Filing: 1943-11-10
•
Granted: 1949-04-19
•
Expires: 1963-11-10
Abstract
No abstract record available.
Inventors
- 👤 John W Coltman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:54
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/08; H01J; H01J5/00; H01J5/20; H01J2893/00; H01J2893/0033; H01J2893/0037
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2172548A
Cited
US2223082A
Cited
US2167431A
Cited
US2200023A
Cited
US2394398A
Cited
US2404085A
Cited
US2407318A
Cited
US2407069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |