Patent US3021256A successfully refreshed from Google Patents.
US3021256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial process water treatment
Assignee: ChampionX LLC
•
Filing: 1958-06-02
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Granted: 1962-02-13
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Expires: 1978-06-02
Abstract
No abstract record available.
Inventors
- 👤 Carol H Bollenback
- 👤 George R Hunt
- 👤 Jerry J Svarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:56
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/20; C07C49/213; C07C49/217; C07C49/223; C07C49/04; C07C49/16; C07C49/76; C07C49/80; C07C49/813; Y; Y10; Y10S; Y10S507/00; Y10S507/92
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A SUSPENSION COMPRISING WATER WHICH CONTAINS FROM 0.1% TO 15% BY WEIGHT OF SUSPENDED CELLULOSE FIBERS AND A BIOLAGICALLY-ACTIVE AMOUNT OF A HALOGENATED KETONE CONTAINING MORE THAN THREE CARBON ATOMS BUT LESS THAN EIGHTEEN CARBON ATOMS.
References Cited (Backward Citations)
US2853528A
Cited
US1816441A
Cited
US2338791A
Cited
US2684924A
Cited
US2802768A
Cited
US2901394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |