Patent US2690377A successfully refreshed from Google Patents.
US2690377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of matter comprising water soluble aluminum phosphates and method of preparing same
Assignee: Individual
•
Filing: 1953-04-02
•
Granted: 1954-09-28
•
Expires: 1973-04-02
Abstract
No abstract record available.
Inventors
- 👤 John W Lefforge
- 👤 Robert W Atteberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:50
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A COMPOSITION OF MATTER COMPRISING A WATER SOLUBLE ALUMINUM HYDROGEN PHOSPHATE AND A SUFFICIENT AMOUNT OF BORIC ACID TO REDUCE SUBSTANTIALLY THE TENDENCY OF SAID PHOSPHATE TO CRYSTALLIZE WHEN IN CONTACT WITH WATER, SAID PHOSPHATE HAVING AN ALUMINUM OXIDE TO PHOSPHORUS PENTOXIDE MOLAR RATIO WITHIN THE RANGE OF ABOUT 1:3 TO ABOUT 2:3.
Claim 2
Dependent Claim
53 words
A COMPOSITION OF MATTER COMPRISING A WATER SOLUBLE ALUMINUM HYDROGEN PHOSPHATE AND A SUFFICIENT AMOUNT OF BORIC ACID TO REDUCE SUBSTANTIALLY THE TENDENCY OF SAID PHOSPHATE TO CRYSTALLIZE WHEN IN CONTACT WITH WATER, SAID PHOSPHATE HAVING AN ALUMINUM OXIDE TO PHOSPHORUS PENTOXIDE MOLAR RATIO WITHIN THE RANGE OF ABOUT 1:3 TO ABOUT 2:3.
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) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |