Patent JPH0329634A successfully refreshed from Google Patents.
US2783200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sludge conditioning and dispersing agents for boiler water treatment
Assignee: Dearborn Chemical Co
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Filing: 1951-11-03
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Granted: 1957-02-26
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Expires: 1971-11-03
Abstract
No abstract record available.
Inventors
- 👤 Ferris B Crum
- 👤 John F Wilkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:25
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/105; Y; Y10; Y10S; Y10S159/00; Y10S159/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
AN INTERNAL BOILER WATER TREATMENT PROCESS THAT COMPRISES DISPERSING INTO THE BOILER WATER, IN AMOUNTS SUFFICIENT TO MAINTAIN 0.3 TO 20 P. P. M. CONCENTRATION, A WATER-SOLUBLE ACRYLIC POLYMER WHOSE POLYMER CHAIN STRUCTURE COMPRISES UNITS HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
39 words
AN INTERNAL BOILER WATER TREATMENT PROCESS THAT COMPRISES DISPERSING INTO THE BOILER WATER, IN AMOUNTS SUFFICIENT TO MAINTAIN 0.3 TO 20 P. P. M. CONCENTRATION, A WATER-SOLUBLE ACRYLIC POLYMER WHOSE POLYMER CHAIN STRUCTURE COMPRISES UNITS HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |