Patent US2057773A successfully refreshed from Google Patents.
US2057773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic distributor
Assignee: Individual
•
Filing: 1935-12-04
•
Granted: 1936-10-20
•
Expires: 1955-12-04
Abstract
No abstract record available.
Inventors
- 👤 William G H Finch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:32
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/10; H04L13/12; H04L13/14; H04L17/00; H04L17/02; H04L17/12; H04L17/14
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) | 1939-10-20 | 1940-04-20 | 1940-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-10-20 | 1944-04-20 | 1944-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-10-20 | 1948-04-20 | 1948-10-20 | $7700.00 | Window Closed / Lapsed |