US1027755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier.
Assignee: Individual
•
Filing: 1907-08-07
•
Granted: 1912-05-28
•
Expires: 1927-08-07
Abstract
No abstract record available.
Inventors
- 👤 Greenleaf Whittier Pickard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:53
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/64; H01; H01H; H01H47/00; H01H47/02; H01H47/18
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) | 1915-05-28 | 1915-11-27 | 1916-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-05-28 | 1919-11-27 | 1920-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-05-28 | 1923-11-27 | 1924-05-28 | $7700.00 | Window Closed / Lapsed |