US3595799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pickling additive
Assignee: CROWN CHEMICAL Co Inc
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Filing: 1968-04-01
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Granted: 1971-07-27
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Expires: 1988-04-01
Abstract
Abstract A PICKLING ADDITIVE COMPOSITION COMPRISING FROM 2025% THIOUREA, 20-25% UREA, 20-25% DI-AMMONIUM PHOSPHATE AND 20-25% ETHYLENEDIAMINETETRACETIC ACID (EDTA), WHICH, WHEN ADDED TO AN ACID PICKLING BATH, REDUCES ACID CONSUMPTION BY AT LEAST 25%.
Inventors
- 👤 Joseph C Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:22
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |