US2493661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetron cavity structure and method of manufacture of same
Assignee: Philips Laboratories Inc
•
Filing: 1947-03-15
•
Granted: 1950-01-03
•
Expires: 1967-03-15
Abstract
No abstract record available.
Inventors
- 👤 George A Espersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:14
CPC Classifications
C; C25; C25D; C25D1/00; H; H01; H01J; H01J23/00; H01J23/16; H01J23/165; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587; H01J25/593
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1802185A
Cited
US1919984A
Cited
US2247077A
Cited
US2340500A
Cited
US2404212A
Cited
US2416899A
Cited
US2423161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |