US1307644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
swanston
Assignee: —
•
Filing: —
•
Granted: 1919-06-24
•
Expires: 1936-06-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:04
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/08; H03K17/082; H03K17/0822; F; F02; F02P; F02P3/00; F02P3/02; F02P3/04; F02P3/055; F02P3/0552
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) | 1922-06-23 | 1922-12-23 | 1923-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-06-23 | 1926-12-23 | 1927-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-06-23 | 1930-12-23 | 1931-06-24 | $7700.00 | Window Closed / Lapsed |