US3057764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of metal surfaces
Assignee: Motors Liquidation Co
•
Filing: 1959-08-18
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Granted: 1962-10-09
•
Expires: 1979-08-18
Abstract
No abstract record available.
Inventors
- 👤 Boda Mitchell A La
- 👤 Charles R Wiese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:28
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
THE METHOD OF CHEMICALLY MACHINING A PART MADE OF A METAL FROM THE GROUP CONSISTING OF STAINLESS STEEL, NICKEL BASE ALLOYS AND COBALT BASE ALLYS, SAID METHOD COMPRISING APPLYING TO SAID PART AN AQUEOUS BATH SOLUTION CONSISTING ESSENTIALLY OF APPROXIMATELY 35% TO 55% OF A 42* BAUME'' AQUEOUS FERRIC CHLORIDE SOLUTION, ABOUT 26% TO 40% OF CONCENTRATED HYDROCHLORIC ACID, ABOUT 8% TO 14% OF CONCENTRATED NITRIC ACID, ALL PROPORTIONS BY VOLUME, AND SUFFICIENT IODINE TO AT LEAST SUBSTANTIALLY MAINTAIN SURFACE SMOOTHNESS.
References Cited (Backward Citations)
CA513130A
Cited
US1776535A
Cited
US2266430A
Cited
US2684892A
Cited
US2746848A
Cited
US2890944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |