US1076312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wireless duplex system.
Assignee: Individual
•
Filing: 1910-06-04
•
Granted: 1913-10-21
•
Expires: 1930-06-04
Abstract
No abstract record available.
Inventors
- 👤 Richard Pfund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:37
CPC Classifications
H; H04; H04L; H04L9/00; H04L9/40; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/50
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) | 1916-10-20 | 1917-04-21 | 1917-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-10-20 | 1921-04-21 | 1921-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-10-20 | 1925-04-21 | 1925-10-21 | $7700.00 | Window Closed / Lapsed |