US3505474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable computer terminal using digital code over conventional telephone channel
Assignee: VDP Corp
•
Filing: 1967-03-06
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Granted: 1970-04-07
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Expires: 1987-03-06
Abstract
No abstract record available.
Inventors
- 👤 Jesse T Quatse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:34
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64; H04M1/65; H04M1/654; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G06; G06F; G06F3/00; G06F3/16; H04M1/82; H04M11/00; H04M11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |