US2804393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia resistant cement
Assignee: Standard Oil Co
•
Filing: 1954-12-31
•
Granted: 1957-08-27
•
Expires: 1974-12-31
Abstract
No abstract record available.
Inventors
- 👤 Veatch Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:23
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C09; C09D; C09D5/00; C09D5/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A COMPOSITION EFFECTIVE AS A SEAL AND RESISTANT TO ANHYDROUS AMMONIA FORMED FROM A MIXTURE CONSISTING ESSENTIALLY OF LEAD OXIDE, SUBSTANTIALLY ANHYDROUS GLYCERIN, AND A SOLID COMPOUND CAPABLE OF CHEMICALLY COMBINING WATER, SAID INGREDIENTS BEING IN THE RATIO OF 2-5:1:0.1-2.0 PARTS BY WEIGHT.
Claim 2
Dependent Claim
43 words
A COMPOSITION EFFECTIVE AS A SEAL AND RESISTANT TO ANHYDROUS AMMONIA FORMED FROM A MIXTURE CONSISTING ESSENTIALLY OF LEAD OXIDE, SUBSTANTIALLY ANHYDROUS GLYCERIN, AND A SOLID COMPOUND CAPABLE OF CHEMICALLY COMBINING WATER, SAID INGREDIENTS BEING IN THE RATIO OF 2-5:1:0.1-2.0 PARTS BY WEIGHT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |