Patent US3303310A successfully refreshed from Google Patents.
US3303310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-pressure circuit interrupter control device
Assignee: Westinghouse Electric Corp
•
Filing: 1963-01-21
•
Granted: 1967-02-07
•
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 05:15
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.
References Cited (Backward Citations)
US1820063A
Cited
US2108560A
Cited
GB543922A
Cited
US2517739A
Cited
US2635153A
Cited
US2757261A
Cited
US2773251A
Cited
US2824937A
Cited
US2955182A
Cited
GB885933A
Cited
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 |