US3369987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for periodically supplying make-up material to an electrochemical bath
Assignee: Individual
•
Filing: 1964-06-05
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Granted: 1968-02-20
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Expires: 1984-06-05
Abstract
No abstract record available.
Inventors
- 👤 Davidoff Charles
- 👤 Bitko Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:17
CPC Classifications
C; C25; C25D; C25D21/00; C25D21/12; C25D21/14; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
APPARATUS FOR PERIODICALLY SUPPLYING MAKE-UP MATERIAL TO THE BATH OF ELECTROCHEMICAL EQUIPMENT, WHERE SUCH EQUIPMENT INCLUDES ELECTRODES AND ELECTROD-CURRENT SUPPLY MEANS, SAID APPARATUS INCLUDING A FEEDING DEVICE EFFECTIVE WHEN OPERATED TO DELIVER A PREDETERINED AMOUNT OF MAKE-UP MATERILA TO THE BATH, AN INTEGRATING NETWORK INCLUDING A CAPACITOR FOR STORING A CHARGE REPRESENTING THE INTEGRAL WITH TIME OF A VOLTAGE APPLIED TO THE INPUT
Claim 2
Dependent Claim
63 words
APPARATUS FOR PERIODICALLY SUPPLYING MAKE-UP MATERIAL TO THE BATH OF ELECTROCHEMICAL EQUIPMENT, WHERE SUCH EQUIPMENT INCLUDES ELECTRODES AND ELECTROD-CURRENT SUPPLY MEANS, SAID APPARATUS INCLUDING A FEEDING DEVICE EFFECTIVE WHEN OPERATED TO DELIVER A PREDETERINED AMOUNT OF MAKE-UP MATERILA TO THE BATH, AN INTEGRATING NETWORK INCLUDING A CAPACITOR FOR STORING A CHARGE REPRESENTING THE INTEGRAL WITH TIME OF A VOLTAGE APPLIED TO THE INPUT
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |