Patent US3681180A successfully refreshed from Google Patents.
Patent US2755340A successfully refreshed from Google Patents.
US2755340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit reserving system
Assignee: Government of Netherlands
•
Filing: 1952-01-08
•
Granted: 1956-07-17
•
Expires: 1972-01-08
Abstract
No abstract record available.
Inventors
- 👤 Oberman Roelof Maarten Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:34
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q1/00; H04Q1/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |