US3515807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conference arrangement having a plurality of transmission modes
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1966-05-05
•
Granted: 1970-06-02
•
Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 Robert C Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:30
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2403475A
Cited
US3099719A
Cited
US3301962A
Cited
US3284577A
Cited
US3384717A
Cited
US3423532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |