US3539998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communications system and remote scanner and control units
Assignee: Unisys Corp
•
Filing: 1967-07-12
•
Granted: 1970-11-10
•
Expires: 1987-07-12
Abstract
No abstract record available.
Inventors
- 👤 Richmond D Belcher
- 👤 David L Griffith
- 👤 Richard G Sacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:52
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/14; G06F13/20; G06F13/22; G06F13/36; G06F13/362; G06F13/366; G06F13/38; G06F13/42; G06F13/4204; G06F13/4208; G06F13/4213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3058659A
Cited
US3413448A
Cited
US3331055A
Cited
US3407387A
Cited
US3351919A
Cited
US3396372A
Cited
US3413612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |