Patent US1853228A successfully refreshed from Google Patents.
US1853228A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1929-02-25
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Granted: 1932-04-12
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Expires: 1949-02-25
Abstract
No abstract record available.
Inventors
- 👤 Delbert E Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:24
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/12; H02G3/123; Y; Y10; Y10S; Y10S248/00; Y10S248/906
Claims Analysis
Total Claims: 0
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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) | 1935-04-12 | 1935-10-12 | 1936-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-12 | 1939-10-12 | 1940-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-12 | 1943-10-12 | 1944-04-12 | $7700.00 | Window Closed / Lapsed |