Patent US3378581A successfully refreshed from Google Patents.
US3378581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamine salts useful for inhibiting the corrosion in return steam condensate lines
Assignee: ChampionX LLC
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Filing: 1961-07-31
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Granted: 1968-04-16
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Louis E Hummel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:00
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
SALTS OF AN ALIPHATIC CARBOXYLIC ACID AND SALTS O THE REACTION PRODUCT OF 3 MOLS OF ETHYLENE OXIDE PER MOL OF A SUBSTITUTED ALKYLENE DIAMINE OF THE FORMULA
Claim 2
Dependent Claim
28 words
SALTS OF AN ALIPHATIC CARBOXYLIC ACID AND SALTS O THE REACTION PRODUCT OF 3 MOLS OF ETHYLENE OXIDE PER MOL OF A SUBSTITUTED ALKYLENE DIAMINE OF THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |