US3072460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid phosphoric acid compositions
Assignee: Collier Carbon and Chemical Corp
•
Filing: 1959-11-23
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Granted: 1963-01-08
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Expires: 1979-11-23
Abstract
No abstract record available.
Inventors
- 👤 Donald C Young
- 👤 Backlund Peter Stanley
- 👤 Fort Kenneth Weldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:16
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PHOSPHORIC ACID COMPOSITION HAVING AN ACID CONCENTRATION EXPRESSED AS P2O5 ON AN IMPURITY AND ADDITIVEFREE BASIS BETWEEN 67 AND 74 WEIGHT PERCENT AND CONTAINING BETWEEN ABOUT 0.01 AND 2.5 WEIGHT PERCENT NITROGEN IN THE FORM OF AN AMIDE HAVING THE FORMULA OF:
Claim 2
Dependent Claim
43 words
A PHOSPHORIC ACID COMPOSITION HAVING AN ACID CONCENTRATION EXPRESSED AS P2O5 ON AN IMPURITY AND ADDITIVEFREE BASIS BETWEEN 67 AND 74 WEIGHT PERCENT AND CONTAINING BETWEEN ABOUT 0.01 AND 2.5 WEIGHT PERCENT NITROGEN IN THE FORM OF AN AMIDE HAVING THE FORMULA OF:
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |