Patent US2415819A successfully refreshed from Google Patents.
US1425967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Samuel
Assignee: —
•
Filing: —
•
Granted: 1922-08-15
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Expires: 1939-08-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:35
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; H; H01; H01K; H01K1/00; H01K1/28; H01K1/32; H01K3/00; H01K3/005; Y; Y10; Y10S; Y10S425/00; Y10S425/808
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) | 1925-08-14 | 1926-02-13 | 1926-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-08-14 | 1930-02-13 | 1930-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-08-14 | 1934-02-13 | 1934-08-15 | $7700.00 | Window Closed / Lapsed |