Patent US2438962A successfully refreshed from Google Patents.
US2438962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of thyratron in impulse generating circuits
Assignee: COLONIAL RADIO Corp
•
Filing: 1944-08-07
•
Granted: 1948-04-06
•
Expires: 1964-08-07
Abstract
No abstract record available.
Inventors
- 👤 Ernest D Burlingame
- 👤 Robert W Carlson
- 👤 Jr Madison G Nicholson
- 👤 Mazwell C Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:51
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/55
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |