Patent US2901438A successfully refreshed from Google Patents.
US2901438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitors
Assignee: Union Carbide Corp
•
Filing: 1956-10-25
•
Granted: 1959-08-25
•
Expires: 1976-10-25
Abstract
No abstract record available.
Inventors
- 👤 Lewis M Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:08
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD FOR INHIBITIMNG THE CORROSION OF FERROUS METALS IN SEA WATER, WHICH COMPRISES ADDING TO SAID SEA WATER AT LEAST ONE PHOSPHORUS-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORTHOPHOSPHORIC ACID, PYRIDINE PHOSPHATE, IN A CONCENTRATION GREATER THAN 20 PARTS ANILINE PHOSPHATE, IN A CONCENTRATION GREATER THAN 20 PARTS OF SAID PHOSPHORUS-CONTAINING COMPOUND PER MILLION PARTS OF SAID SEA WATER AND EFFECTING A PH VALUE OF NOT LESS THAN 4.5 IN SAID SEA WATER.
Claim 2
Independent Claim
75 words
A METHOD FOR INHIBITIMNG THE CORROSION OF FERROUS METALS IN SEA WATER, WHICH COMPRISES ADDING TO SAID SEA WATER AT LEAST ONE PHOSPHORUS-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORTHOPHOSPHORIC ACID, PYRIDINE PHOSPHATE, IN A CONCENTRATION GREATER THAN 20 PARTS ANILINE PHOSPHATE, IN A CONCENTRATION GREATER THAN 20 PARTS OF SAID PHOSPHORUS-CONTAINING COMPOUND PER MILLION PARTS OF SAID SEA WATER AND EFFECTING A PH VALUE OF NOT LESS THAN 4.5 IN SAID SEA WATER.
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |