US2984786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase comparator
Assignee: Individual
•
Filing: 1959-08-31
•
Granted: 1961-05-16
•
Expires: 1979-08-31
Abstract
No abstract record available.
Inventors
- 👤 Harold R Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:20
CPC Classifications
G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563879A
Cited
US2644133A
Cited
US2858425A
Cited
US2795695A
Cited
US2794952A
Cited
US2862180A
Cited
US2904683A
Cited
US2863180A
Cited
US2940042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |