US3247796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure sparking device
Assignee: Individual
•
Filing: 1964-03-23
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Granted: 1966-04-26
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Expires: 1984-03-23
Abstract
No abstract record available.
Inventors
- 👤 Howard A Kirshner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:01
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN AN ELECTRIC FIRING SYSTEM COMPRISING A HIGH PRESSURE SPARKING DEVICE, MEANS FOR STORING ELECTRICAL ENERGY UP TO THE SPARKING VOLTAGE OF SAID DEVICE, MEANS FOR SUPPLYING ELECTRICAL ENERGY TO SAID STORAGE MEANS, AND SELECTOR SWITCH MEANS CONNECTED BETWEEN SAID DEVICE AND SAID STORAGE AND SUPPLY MEANS FOR CLOSING A FIRST CIRCUIT BETWEEN SAID STORAGE AND SUPPLY MEANS TO PERMIT STORING OF ELECTRICAL ENERGY UP TO THE SPARKING VOLTAGE OF SAID DEVICE AND ALTERNATIVELY FOR CLOSING A SECOND CIRCUIT BETWEEN SAID STORAGE MEANS AND SAID DEVICE TO PERMIT DISCHARGE OF STORED ELECTRICAL ENERGY TO EFFECT SPARKING OF SAID DEVICE, THE IMPROVEMENT WHEREIN SAID DEVICE COMPRISES.
Claim 2
Dependent Claim
105 words
IN AN ELECTRIC FIRING SYSTEM COMPRISING A HIGH PRESSURE SPARKING DEVICE, MEANS FOR STORING ELECTRICAL ENERGY UP TO THE SPARKING VOLTAGE OF SAID DEVICE, MEANS FOR SUPPLYING ELECTRICAL ENERGY TO SAID STORAGE MEANS, AND SELECTOR SWITCH MEANS CONNECTED BETWEEN SAID DEVICE AND SAID STORAGE AND SUPPLY MEANS FOR CLOSING A FIRST CIRCUIT BETWEEN SAID STORAGE AND SUPPLY MEANS TO PERMIT STORING OF ELECTRICAL ENERGY UP TO THE SPARKING VOLTAGE OF SAID DEVICE AND ALTERNATIVELY FOR CLOSING A SECOND CIRCUIT BETWEEN SAID STORAGE MEANS AND SAID DEVICE TO PERMIT DISCHARGE OF STORED ELECTRICAL ENERGY TO EFFECT SPARKING OF SAID DEVICE, THE IMPROVEMENT WHEREIN SAID DEVICE COMPRISES.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |