US3303310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-pressure circuit interrupter control device
Assignee: Westinghouse Electric Corp
•
Filing: 1963-01-21
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Granted: 1967-02-07
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Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Daniel H Mckeough
- 👤 The Mellon National Bank A Com
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:11
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/53; H01H33/56; H01H33/562
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A DUAL-PRESSURE TYPE OF GAS-BLAST CIRCUIT INTERRUPTER INCLUDING MEANS DEFINING A FIRST GAS SPACE AT ONE PRESSURE AND A SECOND GAS SPACE AT A HIGHER PRESSURE, SEPARABLE CONTACT MEANS, BLAST-VALVE MEANS FOR CONTROLLING A BLAST OF GAS OUT OF SAID SECOND GAS SPACE THROUGH THE ARC ESTABLISHED AT SAID SEPARABLE CONTACT MEANS TO EXHAUST INTO THE FIRST GAS SPACE, A GAS COMPRESSOR FOR RECOMPRESSING THE GAS FROM THE FIRST GAS SPACE AND FORCING IT UNDER PRESSURE INTO THE SECOND GAS SPACE, AND A DENSITY-RATIO SWITCH TO REGULATE THE RATIO OF GAS DENSITIES IN THE TWO GAS SPACES FOR ELECTRICALLY CONTROLLING OPERACTION OF THE GAS COMPRESSOR.
Claim 2
Dependent Claim
105 words
A DUAL-PRESSURE TYPE OF GAS-BLAST CIRCUIT INTERRUPTER INCLUDING MEANS DEFINING A FIRST GAS SPACE AT ONE PRESSURE AND A SECOND GAS SPACE AT A HIGHER PRESSURE, SEPARABLE CONTACT MEANS, BLAST-VALVE MEANS FOR CONTROLLING A BLAST OF GAS OUT OF SAID SECOND GAS SPACE THROUGH THE ARC ESTABLISHED AT SAID SEPARABLE CONTACT MEANS TO EXHAUST INTO THE FIRST GAS SPACE, A GAS COMPRESSOR FOR RECOMPRESSING THE GAS FROM THE FIRST GAS SPACE AND FORCING IT UNDER PRESSURE INTO THE SECOND GAS SPACE, AND A DENSITY-RATIO SWITCH TO REGULATE THE RATIO OF GAS DENSITIES IN THE TWO GAS SPACES FOR ELECTRICALLY CONTROLLING OPERACTION OF THE GAS COMPRESSOR.
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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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |