US3549538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scale inhibition and removal in steam generation
Assignee: ChampionX LLC
•
Filing: 1967-06-22
•
Granted: 1970-12-22
•
Expires: 1987-06-22
Abstract
No abstract record available.
Inventors
- 👤 Clarence Jacklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12; C02F1/00; C02F1/52; C02F1/54; C02F5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2396938A
Cited
US2723956A
Cited
US2783200A
Cited
US2980610A
Cited
US3308065A
Cited
US3438811A
Cited
US3296027A
Cited
US3331773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |