US3515806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable input-output terminal
Assignee: HP Enterprise Services LLC
•
Filing: 1968-09-16
•
Granted: 1970-06-02
•
Expires: 1988-09-16
Abstract
No abstract record available.
Inventors
- 👤 Earl D Spraker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:03
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/06; H04M11/066; H04L; H04L27/00; H04L27/26; H04L27/30
Claims Analysis
Total Claims: 0
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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 |