US4303780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ureylenes and uses thereof
Assignee: Baker Hughes Holdings LLC
•
Filing: 1980-02-26
•
Granted: 1981-12-01
•
Expires: 2000-02-26
Abstract
Abstract This invention relates to ureylene prepared by reacting an oxyalkylated polyamine with urea and to uses of such ureylene for example in removing oils, solids, and combinations thereof from aqueous systems, etc.
Inventors
- 👤 Thomas J. Bellos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:11
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2618; C08G65/2621; C08G71/00; C08G71/02; B03D1/01; B03D2201/00; B03D2201/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
32 words
A ureylene derived from first reacting a polyamine with about 0.5 to 0.8 mole of an oxyalkylating agent per NH equivalents of said polyamine, and thereafter reacting said oxyalkylated polyamine with urea.
Claim 2
Dependent Claim
32 words
A ureylene derived from first reacting a polyamine with about 0.5 to 0.8 mole of an oxyalkylating agent per NH equivalents of said polyamine, and thereafter reacting said oxyalkylated polyamine with urea.
Claim 3
Dependent Claim
24 words
The ureylene of claim 1 where the amount of urea added is about 0.5 to 0.8 mole per NH equivalents of said oxyalkylated polyamine.
Claim 4
Dependent Claim
13 words
The ureylene of claim 2 where said oxyalkylating agent is an alkylene oxide.
Claim 5
Dependent Claim
12 words
The ureylene of claim 3 where said alkylene oxide is ethylene oxide.
Claim 6
Dependent Claim
19 words
The ureylene of claim 4 where said ureylene is converted to salt form to make it more water soluble.
Claim 7
Dependent Claim
16 words
The ureylene of claim 5 where said conversion occurs by contact of the ureylene with HCl.
Claim 8
Dependent Claim
33 words
A process for obtaining ureylenes comprising: reacting a polyamine with about 0.5 to 0.8 mole of an oxyalkylating agent per NH equivalents of said polyamine, and thereafter reacting said oxyalkylated polyamine with urea.
Claim 9
Dependent Claim
33 words
A process for obtaining ureylenes comprising: reacting a polyamine with about 0.5 to 0.8 mole of an oxyalkylating agent per NH equivalents of said polyamine, and thereafter reacting said oxyalkylated polyamine with urea.
Claim 10
Dependent Claim
24 words
The process of claim 7 where the amount of urea added is about 0.5 to 0.8 mole per NH equivalents of said oxyalkylated polyamine.
Claim 11
Dependent Claim
12 words
The process of claim 8 where said oxyalkylating agent is ethylene oxide.
Claim 12
Dependent Claim
18 words
The process of claim 9 where ureylene is converted to salt form to make it more water soluble.
Claim 13
Dependent Claim
16 words
The process of claim 10 where said conversion occurs by contact of said ureylene with HCl.
References Cited (Backward Citations)
US2155328A
Cited
US3324176A
Cited
US3617440A
Cited
US4178427A
Cited
US4154724A
Cited
US4178426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |