US2691151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple switching systems
Assignee: Products & Licensing Corp
•
Filing: 1950-05-22
•
Granted: 1954-10-05
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Expires: 1970-05-22
Abstract
No abstract record available.
Inventors
- 👤 Toulon Pierre Marie Gabriel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:53
CPC Classifications
H; H01; H01H; H01H67/00; H01H67/22; H01H67/26; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/042; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/525
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US876701A
Cited
US2023589A
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US2291752A
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US2350888A
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US2317471A
Cited
US2434989A
Cited
US2547804A
Cited
US2542672A
Cited
US2603716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |