US4051110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylene phosphonates of polymerized polyalkylenepolyamines
Assignee: Baker Petrolite LLC
•
Filing: 1976-04-22
•
Granted: 1977-09-27
•
Expires: 1996-04-22
Abstract
Abstract Methylene phosphonates of polyalkylenepolyamines polymerized with chain extenders such as epoxyhalides, dihalides, etc., such as epihalohydrin, alkylenedihalide, alkenyldihalide, alkynylenedihalide, xylylenedihalide, alkyleneetherdihalides, etc.; and to uses therefor, particularly as scale inhibitors, chelating agents, etc.
Inventors
- 👤 Patrick M. Quinlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:04
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022; Y; Y10; Y10S; Y10S507/00; Y10S507/903; Y10S507/927
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
Methylene phosphonates of polymers selected from the group consisting of polyalkylenepolyamine-epihalohydrin polymers and polyalkylenepolyamine-dihalide compound polymers, said dihalide compounds being an alkylene ether dihalide compound, or an unsaturated dihalide compound, said methylene phosphonate polymers having nitrogen-bonded methylene phosphonate units of the formula --CH.sub.2 PO(OM).sub.2 where M is alkali metal, alkaline earth metal, hydrogen, alkyl ammonium or ammonium, the terminal nitrogen atoms of said methylene phosphonate polymers having no more than one methylene phosphonate group attached thereto, the remaining valence of the terminal nitrogen atom having attached thereto the group ##STR29## a divalent aliphatic ether radical or a divalent unsaturated aliphatic radical, said polymers being those having controlled crosslinking so that they are soluble in, dispersible in or soluble and dispersible in an aqueous medium.
Claim 2
Dependent Claim
124 words
Methylene phosphonates of polymers selected from the group consisting of polyalkylenepolyamine-epihalohydrin polymers and polyalkylenepolyamine-dihalide compound polymers, said dihalide compounds being an alkylene ether dihalide compound, or an unsaturated dihalide compound, said methylene phosphonate polymers having nitrogen-bonded methylene phosphonate units of the formula --CH.sub.2 PO(OM).sub.2 where M is alkali metal, alkaline earth metal, hydrogen, alkyl ammonium or ammonium, the terminal nitrogen atoms of said methylene phosphonate polymers having no more than one methylene phosphonate group attached thereto, the remaining valence of the terminal nitrogen atom having attached thereto the group ##STR29## a divalent aliphatic ether radical or a divalent unsaturated aliphatic radical, said polymers being those having controlled crosslinking so that they are soluble in, dispersible in or soluble and dispersible in an aqueous medium.
Claim 3
Dependent Claim
14 words
The methylene phosphonates of polymers of claim 1 where the polymers are polyalkylenepolyamine-epihalohydrin polymers.
Claim 4
Dependent Claim
15 words
The methylene phosphonates of polymers of claim 1 where the polymers are polyalkylenepolyamine-dihalide compound polymers.
Claim 5
Dependent Claim
19 words
The methylene phosphonates of polymers of claim 2 where the polymers have repeating units of the idealized formula ##STR30##
Claim 6
Dependent Claim
20 words
The methylene phosphonates of polymers of claim 3 where the polymers have the repeating units of the idealized formula ##STR31##
Claim 7
Dependent Claim
19 words
The methylene phosphonates of polymers of claim 3 where the polymers have repeating units of the idealized formula ##STR32##
Claim 8
Dependent Claim
19 words
The methylene phosphonates of polymers of claim 3 where the polymers have repeating units of the idealized formula ##STR33##
Claim 9
Dependent Claim
19 words
The methylene phosphonates of polymers of claim 3 where the polymers have repeating units of the idealized formula ##STR34##
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |