US2577147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for the identification of potential differences
Assignee: Individual
•
Filing: 1949-08-20
•
Granted: 1951-12-04
•
Expires: 1969-08-20
Abstract
No abstract record available.
Inventors
- 👤 Roelof M M Oberman
- 👤 Snijders Antonie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:04
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2252599A
Cited
US2434922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |