US1460913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching apparatus for telephone systems
Assignee: Individual
•
Filing: 1920-10-21
•
Granted: 1923-07-03
•
Expires: 1940-10-21
Abstract
No abstract record available.
Inventors
- 👤 Lienzen David Laurentius
- 👤 Larsson Knut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:53
CPC Classifications
H; H01; H01H; H01H67/00; H01H67/02; H01H67/04; H01H67/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1926-07-02 | 1927-01-01 | 1927-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-07-02 | 1931-01-01 | 1931-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-07-02 | 1935-01-01 | 1935-07-03 | $7700.00 | Window Closed / Lapsed |