US2713680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binary contact making counter
Assignee: Northrop Grumman Corp
•
Filing: 1949-06-21
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Granted: 1955-07-19
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Expires: 1969-06-21
Abstract
No abstract record available.
Inventors
- 👤 Ackerlind Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:24
CPC Classifications
H; H03; H03M; H03M1/00; G; G06; G06M; G06M1/00; G06M1/27; H03M1/12; H03M1/22
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) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |