Patent US3420760A successfully refreshed from Google Patents.
US3420760A
Expired / Lapsed
US
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Process for descaling steel strip in an aqueous organic chelating bath using alternating current
Assignee: General Dynamics Corp
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Filing: 1965-04-30
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Granted: 1969-01-07
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Bernard J Freedman
- 👤 Richard A Georgetti
- 👤 William R Tedeschi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:47
CPC Classifications
C; C25; C25F; C25F1/00; C25F1/02; C25F1/04; C25F1/06; C25F7/00
Claims Analysis
Total Claims: 0
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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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |