US2944075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing phosphoric acid and thiophosphoric acid derivatives
Assignee: Joh A Benckiser GmbH
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Filing: 1957-12-19
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Granted: 1960-07-05
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Expires: 1977-12-19
Abstract
No abstract record available.
Inventors
- 👤 Debo Arno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:25
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/22; C07F9/24; C07F9/2454; C07F9/247; C07F9/2458
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A METHOD OF PRODUCING A DIAMINE-N-N''-BIS-PHOSPHORIC ACID DERIVATIVE HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Independent Claim
13 words
A METHOD OF PRODUCING A DIAMINE-N-N''-BIS-PHOSPHORIC ACID DERIVATIVE HAVING THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2574516A
Cited
FR1116415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |