US2931778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline composition
Assignee: Diamond Shamrock Corp
•
Filing: 1954-09-28
•
Granted: 1960-04-05
•
Expires: 1974-09-28
Abstract
No abstract record available.
Inventors
- 👤 Frank P Ilenda
- 👤 Howard E Everson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:07
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/28; C21; C21D; C21D1/00; C21D1/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A COMPOSITE ALKALINE COMPOSITION CONSISTING ESSENTIALLY OF, ON A WEIGHT BASIS, 50-95% SODIUM HYDROXIDE, 15-50% POTASSIUM HYDROXIDE, AND 4-15% OF AN ALKALI METAL FLUORIDE.
Claim 2
Dependent Claim
24 words
A COMPOSITE ALKALINE COMPOSITION CONSISTING ESSENTIALLY OF, ON A WEIGHT BASIS, 50-95% SODIUM HYDROXIDE, 15-50% POTASSIUM HYDROXIDE, AND 4-15% OF AN ALKALI METAL FLUORIDE.
References Cited (Backward Citations)
US1705944A
Cited
US2241984A
Cited
US1111444A
Cited
US2062273A
Cited
GB598466A
Cited
US2395694A
Cited
US2569158A
Cited
US2468006A
Cited
US2654701A
Cited
US2801215A
Cited
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 |