Patent US2057027A successfully refreshed from Google Patents.
US2057027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device
Assignee: Individual
•
Filing: 1933-11-06
•
Granted: 1936-10-13
•
Expires: 1953-11-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Hoover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:53
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/04; C02F3/043; C02F1/00; C02F1/006; C02F1/68; C02F1/685; C02F1/686; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/265; Y10T137/2668; Y10T137/2673; Y10T137/2675; Y10T137/7287; Y10T137/7358; Y10T137/7381; Y10T137/7387; Y10T137/74; Y10T137/7404
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) | 1939-10-13 | 1940-04-13 | 1940-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-10-13 | 1944-04-13 | 1944-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-10-13 | 1948-04-13 | 1948-10-13 | $7700.00 | Window Closed / Lapsed |