Patent US2931745A successfully refreshed from Google Patents.
US2931745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of chloride salts in austempering quench baths
Assignee: International Motors LLC
•
Filing: 1958-12-24
•
Granted: 1960-04-05
•
Expires: 1978-12-24
Abstract
No abstract record available.
Inventors
- 👤 John A Halgren
- 👤 Edward A Solecki
- 👤 Robert H Pinkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:16
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/56; C21D1/607
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
FOR REMOVING SUBSTANTIALLY ALL CONTAINING ALKALI METAL CHLORIDES IN EXCESS OF ABOUT 3 PERCENT BY WEIGHT FROM A MOLTEN AUSTEMPERING AND MARTEMPERING QUENCE BATH INITALLY CONTAINING SALTS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL NITRATES AND ALKALI METAL NITRITES, THE METHOD OF TRANSFERRING AT LEAST A PORTION OF SAID CONTAMINATED MOLTEN BATH INTO A LOW TEMPERATURE POT, INTRODUCING INTO SAID POT UP TO ABOUT 10% BY WEIGHT OF WATER TO FORM A LIQUID PHASE COMPOSITION WITH SAID SALTS FRO PRECIPITATING EXCESS ALKALI METAL CHLORIDES IN SOLID PHASE, MECHANICALLY SEPARATING SAID PHASE ALKALI METAL CHLORIDES SUBSTANTIALLY FROM SAID LIQUID PHASE COMPOSITION, AND DISCHARGING SAID LIQUID PHASE COMPOSITION INTO SAID BATH.
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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |