US3289734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scale deposition inhibition in black liquor multiple effect concentration processes using a styrene copolymer
Assignee: ChampionX LLC
•
Filing: 1965-08-17
•
Granted: 1966-12-06
•
Expires: 1985-08-17
Abstract
No abstract record available.
Inventors
- 👤 Reed S Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
C; C23; C23F; C23F14/00; C23F14/02; D; D21; D21C; D21C11/00; D21C11/10; D21C11/106; Y; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S159/13; Y10S159/20; Y10S210/00; Y10S210/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD OF INHIBITING DEPOSIT FORMATION OF METAL SURFACE OF A MULTIPLE-EFFECT EVAPORATOR USED FOR THE PROCESSING OF BACK LIQUOR WHICH COMPRISES THE STEP OF TREATING SAID BLACK LIQUOR AT ANY POINT PRIOR TO COMPLETION OF SAID PROCESSING WITH A POLYMERIC RESIN HAVING A MOLECULAR WEIGHT LESS THAN 10,000 AND CHARACTERIZED AS A POLYALKANE HAVING CHEMICALLY INTEGRAL THEREWITH 25-50 MOLE PERCENT OF REOCCURRING MOIETIES REPRESENTED BY THE FORMULA:
Claim 2
Independent Claim
68 words
A METHOD OF INHIBITING DEPOSIT FORMATION OF METAL SURFACE OF A MULTIPLE-EFFECT EVAPORATOR USED FOR THE PROCESSING OF BACK LIQUOR WHICH COMPRISES THE STEP OF TREATING SAID BLACK LIQUOR AT ANY POINT PRIOR TO COMPLETION OF SAID PROCESSING WITH A POLYMERIC RESIN HAVING A MOLECULAR WEIGHT LESS THAN 10,000 AND CHARACTERIZED AS A POLYALKANE HAVING CHEMICALLY INTEGRAL THEREWITH 25-50 MOLE PERCENT OF REOCCURRING MOIETIES REPRESENTED BY THE FORMULA:
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |