Patent US1128817A successfully refreshed from Google Patents.
US1128817A
Expired / Lapsed
US
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Valve-detector for wireless.
Assignee: WIRELESS SPECIALTY APPARATUS Co
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Filing: 1912-07-03
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Granted: 1915-02-16
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Expires: 1932-07-03
Abstract
No abstract record available.
Inventors
- 👤 Greenleaf Whittier Pickard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:10
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/32; H01J19/34
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) | 1918-02-15 | 1918-08-17 | 1919-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-02-15 | 1922-08-17 | 1923-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-02-15 | 1926-08-17 | 1927-02-16 | $7700.00 | Window Closed / Lapsed |