US3258761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kraus differential annunciator
Assignee: —
•
Filing: —
•
Granted: 1966-06-28
•
Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:49
CPC Classifications
G; G08; G08B; G08B23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A DIFFERENTIAL ANNUNCIATOR COMPRISING A SIGNAL SOURCE CAPABLE OF PRODUCING AN ELECTRICAL SIGNAL HAVING A VALUE IN A RANGE OF NO ALARM CONDITION OR IN AN ADJACENT RANGE OF ALARM CONDITION, INDICATOR MEANS, COUPLING MEANS COUPLING SAID INDICATOR MEANS TO SAID SIGNAL SOURCE INCLUDING A TRIGGER CIRCUIT OPERABLE TO ACTUATE SAID INDICATOR MEANS IN ONE MANNER WHEN THE SIGNAL IS IN THE RANGE OF ALARM CONDITION AND TO ACTUATE SAID INDICATOR MEANS IN ANOTHER MANNER WHEN THE SIGNAL IS IN THE RANGE OF NO ALARM CONDITION. AT LEAST ONE STAGE OF DIFFERENTIAL AMPLIFIER PRO-
Claim 2
Dependent Claim
94 words
A DIFFERENTIAL ANNUNCIATOR COMPRISING A SIGNAL SOURCE CAPABLE OF PRODUCING AN ELECTRICAL SIGNAL HAVING A VALUE IN A RANGE OF NO ALARM CONDITION OR IN AN ADJACENT RANGE OF ALARM CONDITION, INDICATOR MEANS, COUPLING MEANS COUPLING SAID INDICATOR MEANS TO SAID SIGNAL SOURCE INCLUDING A TRIGGER CIRCUIT OPERABLE TO ACTUATE SAID INDICATOR MEANS IN ONE MANNER WHEN THE SIGNAL IS IN THE RANGE OF ALARM CONDITION AND TO ACTUATE SAID INDICATOR MEANS IN ANOTHER MANNER WHEN THE SIGNAL IS IN THE RANGE OF NO ALARM CONDITION. AT LEAST ONE STAGE OF DIFFERENTIAL AMPLIFIER PRO-
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |