US1300022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay for telephone-centrals, &c.
Assignee: Individual
•
Filing: 1917-02-06
•
Granted: 1919-04-08
•
Expires: 1937-02-06
Abstract
No abstract record available.
Inventors
- 👤 Morten Balthazar Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:13
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/02; H01H51/04; H01H51/06
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) | 1922-04-07 | 1922-10-07 | 1923-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-04-07 | 1926-10-07 | 1927-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-04-07 | 1930-10-07 | 1931-04-08 | $7700.00 | Window Closed / Lapsed |