Patent US5537452A successfully refreshed from Google Patents.
US3117553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically controlled milking installation
Assignee: Babson Brothers Co
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Filing: 1960-02-16
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Granted: 1964-01-14
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Expires: 1980-02-16
Abstract
No abstract record available.
Inventors
- 👤 Dujardin Jean Armand Ju Albert
- 👤 Lageot Joseph Leonard Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:52
CPC Classifications
A; A01; A01J; A01J5/00; A01J5/04; A01J5/10; A01J5/14; F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/0603; F16K31/0624; F16K31/0627; F16K31/0631; F16K1/00; F16K1/14; F16K31/0606; H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/282; H03K3/2823; H03L; H03L7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A MILKING SYSTEM HAVING A MILK CUP AND ELECTROMAGNETIC VALVE MEANS INCLUDING A VALVE OPERATING COIL, FOR CONTROLLING THE APPLICATION OF VACUUM AND AIR TO SAID MILK CUP TO EFFECT PULSATIONS THEREIN, SAID COIL HAVING TWO TERMINALS WITH ONE RETURNED TO A REFERENCE POTENTIAL, AN ELECTRONIC CONTROL CIRCUIT COMPRISING: AN OSCILLATOR HAVING AN OUTPUT OF SUBSTANTIALLY RECTANGULAR WAVE FORM; A CIRCUIT WHICH DETERMINES OPERATING FREQUENCY CONNECTED WITH AN ELEMENT OF SAID OSCILLATOR; A CIRCUIT WHICH DETERMINES THE DURATION OF SAID OSCILLATOR OUTPUT WAVE CONNECTED WITH AN ELEMENT OF THE OSCILLATOR; AND A PAIR OF OUTPUT TERMINALS FOR SAID CONTROL CIRCUIT, CONNECTED WITH SAID OSCILLATOR AND WITH SAID VALVE COIL, ONE OF SAID OUTPUT TERMINALS BEING AT SAID REFERENCE POTENTIAL.
Claim 2
Dependent Claim
120 words
IN A MILKING SYSTEM HAVING A MILK CUP AND ELECTROMAGNETIC VALVE MEANS INCLUDING A VALVE OPERATING COIL, FOR CONTROLLING THE APPLICATION OF VACUUM AND AIR TO SAID MILK CUP TO EFFECT PULSATIONS THEREIN, SAID COIL HAVING TWO TERMINALS WITH ONE RETURNED TO A REFERENCE POTENTIAL, AN ELECTRONIC CONTROL CIRCUIT COMPRISING: AN OSCILLATOR HAVING AN OUTPUT OF SUBSTANTIALLY RECTANGULAR WAVE FORM; A CIRCUIT WHICH DETERMINES OPERATING FREQUENCY CONNECTED WITH AN ELEMENT OF SAID OSCILLATOR; A CIRCUIT WHICH DETERMINES THE DURATION OF SAID OSCILLATOR OUTPUT WAVE CONNECTED WITH AN ELEMENT OF THE OSCILLATOR; AND A PAIR OF OUTPUT TERMINALS FOR SAID CONTROL CIRCUIT, CONNECTED WITH SAID OSCILLATOR AND WITH SAID VALVE COIL, ONE OF SAID OUTPUT TERMINALS BEING AT SAID REFERENCE POTENTIAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |