US2318663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for treating boiler water to prevent caustic embrittlement
Assignee: ChampionX LLC
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Filing: 1941-03-04
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Granted: 1943-05-11
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Expires: 1961-03-04
Abstract
No abstract record available.
Inventors
- 👤 Paul G Bird
- 👤 Evans Wilson
- 👤 Harmon Carlyle
- 👤 Salvesen Jorgen Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:51
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-05-10 | 1946-11-09 | 1947-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-10 | 1950-11-09 | 1951-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-10 | 1954-11-09 | 1955-05-11 | $7700.00 | Window Closed / Lapsed |