US3015589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical method
Assignee: Diamond Shamrock Corp
•
Filing: 1959-07-16
•
Granted: 1962-01-02
•
Expires: 1979-07-16
Abstract
No abstract record available.
Inventors
- 👤 Howard E Everson
- 👤 Frank P Ilenda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:12
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
IN A PROCESS FOR TREATING METAL, THE STEPS COMPRISING IMMERSING SAID METAL IN A MOLTEN BATH CONSISTING ESSENTIALLY OF, ON A WEIGHT BASIS, 50 TO 95% SODIUM HYDROXIDE 15 TO 50% POTASSIUM HYDROXIDE, AND 4 TO 15% OF AN ALKALI METAL FLUORIDE.
Claim 2
Dependent Claim
42 words
IN A PROCESS FOR TREATING METAL, THE STEPS COMPRISING IMMERSING SAID METAL IN A MOLTEN BATH CONSISTING ESSENTIALLY OF, ON A WEIGHT BASIS, 50 TO 95% SODIUM HYDROXIDE 15 TO 50% POTASSIUM HYDROXIDE, AND 4 TO 15% OF AN ALKALI METAL FLUORIDE.
References Cited (Backward Citations)
US2738294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |