Patent US3973139A successfully refreshed from Google Patents.
US2923747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of corrosion
Assignee: Dow Chemical Co
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Filing: 1958-04-07
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Granted: 1960-02-02
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Expires: 1978-04-07
Abstract
No abstract record available.
Inventors
- 👤 Donald E Rapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:52
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C07; C07C; C07C17/00; C07C17/38; C07C17/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A POLYCHLORINATED ALIPHATIC HYDROCARBON CORROSION INHIBITOR COMPOSITION COMPRISING A MIXTURE OF FROM 5 TO 95 PERCENT BY VOLUME OF NITROMETHANE AND FROM 95 TO 5 PERCENT BY VOLUME OF 1,4-DIOXANE, RESPECTIVELY.
Claim 2
Dependent Claim
31 words
A POLYCHLORINATED ALIPHATIC HYDROCARBON CORROSION INHIBITOR COMPOSITION COMPRISING A MIXTURE OF FROM 5 TO 95 PERCENT BY VOLUME OF NITROMETHANE AND FROM 95 TO 5 PERCENT BY VOLUME OF 1,4-DIOXANE, RESPECTIVELY.
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |