Patent US2368448A successfully refreshed from Google Patents.
Patent US2933675A successfully refreshed from Google Patents.
US2933675A
Expired / Lapsed
US
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Chemical milling control
Assignee: General Dynamics Corp
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Filing: 1956-12-28
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Granted: 1960-04-19
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Expires: 1976-12-28
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Hoelzle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:30
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
MEANS FOR CONTROLLING THE RATE OF DISCHARGE OF A CHARGED CAPACITOR IN ACCORDANCE WITH THE MILLING RATE OF A CHEMICAL BATH SOLUTION ON A WORKPIECE COMPRISING AN ELECTRICAL ENERGY STORAGE DEVICE, A DISCHARGE PATH FOR DISCHARGING SAID DEVICE, SAID DISCHARGE PATH INCLUDING A VARIABLE INPEDANCE, AND MEANS RESPONSIVE TO THE ELECTRICAL CONDUCTIVITY OF SAID SOLUTION FOR VARYING SAID IMPEDANCE.
Claim 2
Dependent Claim
59 words
MEANS FOR CONTROLLING THE RATE OF DISCHARGE OF A CHARGED CAPACITOR IN ACCORDANCE WITH THE MILLING RATE OF A CHEMICAL BATH SOLUTION ON A WORKPIECE COMPRISING AN ELECTRICAL ENERGY STORAGE DEVICE, A DISCHARGE PATH FOR DISCHARGING SAID DEVICE, SAID DISCHARGE PATH INCLUDING A VARIABLE INPEDANCE, AND MEANS RESPONSIVE TO THE ELECTRICAL CONDUCTIVITY OF SAID SOLUTION FOR VARYING SAID IMPEDANCE.
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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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |