Patents
US 9550935 B2: Method of controlling gas hydrates in fluid systems
- Granted
- 2017-01-24
- Filed
- 2014-12-24 application 14582618
- Type
- Utility · 22 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method of inhibiting hydrates in a fluid comprising water and gas comprising adding to the fluid an effective hydrate-inhibiting amount of a composition comprising one or more copolymers of N-alkyl (alkyl)acrylamide monomers and one or more cationic monomers selected from acid and alkyl chloride quaternary salts of N,N-dialkylaminoalkyl (meth)acrylates and N,N-dialkylaminoalkyl (meth)acrylamides.
Source: PVGPATDIS, file of 2026-04-10 (ipg170124.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Nalco Company LLC 271 patents | US company or organization | Naperville, IL | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Peter G. Conrad | Sugar Land, TX | 5 | PVGPATDIS, file of 2026-04-10 | |
| Erick J. Acosta | Sugar Land, TX | 33 | PVGPATDIS, file of 2026-04-10 | |
| Kevin McNamee | Missouri City, TX | 6 | PVGPATDIS, file of 2026-04-10 | |
| Brian Bennett | Sugar Land, TX | 11 | PVGPATDIS, file of 2026-04-10 | |
| Olga E. S. Lindeman | Brookfield, WI | 3 | PVGPATDIS, file of 2026-04-10 | |
| Joseph R. Carlise | Lisle, IL | 3 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C08F | Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds | C08F220/56 | PVGPATDIS, file of 2026-04-10 |
| C09K | Materials for miscellaneous applications, not provided for elsewhere | C09K8/524 | PVGPATDIS, file of 2026-04-10 |
| C10L | Fuels not otherwise provided for; natural gas; synthetic natural gas obtained by processes not covered by subclasses c10g or c10k; liquified petroleum gas; use of additives to fuels or fires; fire-lighters | C10L3/003 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2025-07-17 | Release of security interest Release of security interest in patents | JPMORGAN CHASE BANK, N.A. signed 2025-07-16 | CHAMPIONX LLC THE WOODLANDS, TX APERGY ESP SYSTEMS, LLC THE WOODLANDS, TX APERGY BMCS ACQUISITION CORP THE WOODLANDS, TX HARBISON-FISCHER, INC. THE WOODLANDS, TX NORRIS RODS, INC., THE WOODLANDS, TX NORRIS RODS, INC., THE WOODLANDS, TX NORRISEAL-WELLMARK, INC. THE WOODLANDS, TX PCS FERGUSON, INC. THE WOODLANDS, TX QUARTZDYNE, INC. THE WOODLANDS, TX US SYNTHETIC CORPORATION THE WOODLANDS, TX | 72004/19 | PASDL, file of 2026-10-15 |
| 2022-06-07 | Release of security interest Release of security interest | BANK OF AMERICA, N.A. signed 2022-06-07 | CHAMPIONX USA INC. SUGAR LAND, TX | 60304/267 | PASDL, file of 2026-10-15 |
| 2020-09-22 | Assignment Assignment of assignor's interest | ECOLAB USA INC. signed 2020-06-03 | CHAMPIONX USA INC. SUGAR LAND, TX | 53849/537 | PASDL, file of 2026-10-15 |
| 2020-06-05 | Security interest Security interest Security interest | CHAMPIONX USA INC. signed 2020-06-03 | JPMORGAN CHASE BANK, N.A. BROOKLYN, NY | 53250/1 | PASDL, file of 2026-10-15 |
| 2020-06-05 | Security interest Security interest Security interest | CHAMPIONX USA INC. signed 2020-06-03 | BANK OF AMERICA, N.A. CHARLOTTE, NC | 52848/368 | PASDL, file of 2026-10-15 |
| 2017-08-22 | Name change Change of name | NALCO COMPANY signed 2015-12-21 | NALCO COMPANY LLC NAPERVILLE, IL | 43633/992 | ECORSEXC, file of 2026-09-25 |
| 2017-08-22 | Assignment Assignment of assignor's interest | NALCO COMPANY LLC signed 2017-02-27 | ECOLAB USA INC. ST. PAUL, MN | 43357/541 | ECORSEXC, file of 2026-09-25 |
| 2016-02-15 | Assignment Assignment of assignor's interest | ACOSTA, ERICK J. signed 2008-10-15 BENNETT, BRIAN M. signed 2008-10-15 CONRAD, PETER G. signed 2008-10-15 MCNAMEE, KEVIN P. signed 2008-10-15 CARLISE, JOSEPH R. signed 2008-10-16 LINDEMAN, OLGA E. S. signed 2008-10-16 | NALCO COMPANY NAPERVILLE, IL | 37736/306 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.