US1814759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode structure
Assignee: Individual
•
Filing: 1926-02-10
•
Granted: 1931-07-14
•
Expires: 1946-02-10
Abstract
No abstract record available.
Inventors
- 👤 Frederick S Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:07
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12771; Y10T428/12861; Y10T428/12896; Y10T428/12944; Y10T428/12986
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-07-13 | 1935-01-12 | 1935-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-13 | 1939-01-12 | 1939-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-13 | 1943-01-12 | 1943-07-14 | $7700.00 | Window Closed / Lapsed |