US2890928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibition
Assignee: Cosmopolitan Chemical Co Inc
•
Filing: 1957-02-26
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Granted: 1959-06-16
•
Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Lloyd I Osipowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:14
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE METHOD OF INHIBITING CORROSION OF FERROUS METAL SURFACES IN A STEAM CONDENSATE SYSTEM COMPRISING ADDING TO THE BOILER FEED WATER A CORROSION INHIBITOR VOLATILIZED WITH THE DISTILLATE CONSISTING ESSENTIALLY OF AN ESSENTIALLY NEUTRAL HIGH MOLECULAR WEIGHT COMPOUND SELECTED FROM THE GROUP CONSISTING OF CNH2N+1CH2OH AND
Claim 2
Independent Claim
46 words
THE METHOD OF INHIBITING CORROSION OF FERROUS METAL SURFACES IN A STEAM CONDENSATE SYSTEM COMPRISING ADDING TO THE BOILER FEED WATER A CORROSION INHIBITOR VOLATILIZED WITH THE DISTILLATE CONSISTING ESSENTIALLY OF AN ESSENTIALLY NEUTRAL HIGH MOLECULAR WEIGHT COMPOUND SELECTED FROM THE GROUP CONSISTING OF CNH2N+1CH2OH AND
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) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |