Patent US2951907A successfully refreshed from Google Patents.
US2951907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic concentrator
Assignee: Individual
•
Filing: 1957-02-27
•
Granted: 1960-09-06
•
Expires: 1977-02-27
Abstract
No abstract record available.
Inventors
- 👤 Charles C Marzin
- 👤 Marc A Chappey
- 👤 Pierre M Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:41
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2783306A
Cited
US2715656A
Cited
US2774822A
Cited
US2724744A
Cited
US2820103A
Cited
US2787667A
Cited
US2812385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |