US2857568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage comparator
Assignee: Applied Biosystems Inc
•
Filing: 1953-07-22
•
Granted: 1958-10-21
•
Expires: 1973-07-22
Abstract
No abstract record available.
Inventors
- 👤 Karl W Hering
- 👤 Jr Robert F Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:48
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/10; G01R1/00; G01R1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2440200A
Cited
US2595675A
Cited
US2618686A
Cited
US2622127A
Cited
US2639411A
Cited
US2657348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |