US3417842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator controls
Assignee: Schindler Elevator Corp
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Filing: 1965-10-08
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Granted: 1968-12-24
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Expires: 1985-10-08
Abstract
No abstract record available.
Inventors
- 👤 James H Kuzara
- 👤 Orval J Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:44
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/02; B66B1/06; B66B1/14; B66B1/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
179 words
AN ELEVATOR CONTROL CIRCUIT FOR ASCERTAINING THE EXISTENCE OF ANY CALL FOR SERVICE AT A LANDING HAVING A GIVEN RELATIONSHIP TO THE EFFECTIVE LOCATION OF THE ELEVATOR CAR, COMPRISING A PLURALITY OF OR''S EACH ASSOCIATED WITH A LANDING, FIRST AND SECOND INPUTS AND AN OUTPUT FOR EACH OF SAID OR''S, A SIGNAL SOURCE REPRESENTATIVE OF A CALL FOR SERVICE AT SAID ASSOCIATED LANDING COUPLED TO SAID FIRST INPUT, SAID OR''S BEING CONNECTED IN SERIES WITH THE OUTPUT OF EACH OR FOR EACH LANDING BUT THE LAST IN THE SERIES BEING CONNECTED TO THE SECOND INPUT OF THE OR FOR THE LANDING NEXT ADJACENT IN A GIVEN DIRECTION, A PLURALITY OF AND''S EACH ASSOCIATED WITH A GIVEN LANDING, FIRST AND SECOND INPUTS AND AN OUTPUT FOR EACH AND, A COUPLING TO THE FIRST INPUT OF EACH AND FROM THE OUTPUT OF AN OR ASSOCIATED WITH A LANDING HAVING A GIVEN RELATIONSHIP TO THE LANDING OF SAID AND, AND A SIGNAL SOURCE REPRESENTATIVE OF EFFECTIVE CAR POSITION AT SAID ASSOCIATED LANDING COUPLED TO THE SECOND INPUT OF EACH AND, WHEREBY A
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |