Patent US5057690A successfully refreshed from Google Patents.
Patent US3049511A successfully refreshed from Google Patents.
US3049511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfated oil soluble phenol formaldehyde polymers
Assignee: ChampionX LLC
•
Filing: 1959-06-15
•
Granted: 1962-08-14
•
Expires: 1979-06-15
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
- 👤 Virgil L Seale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:41
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE OIL SOLUBLE PRODUCT OF THE REACTION OF SULFAMIC ACID WITH AN OXYALKLATED OIL SOLUBLE, ALKALI INSOLUBLE, LINEAR POLYMER OF FORMALDEHYDE AND AN ALKYL PHENOL WHICH IS AT LEAST 75% MONO-ALKYL DIFUNCTION PHENOL WHEREIN THE ALKYL GROUP HAS 4 TO 15 CARBON ATOMS, THE OXYALKYLENE GROUPS CONTAIN 2 TO 3 CARBON ATOMS, AND THE WEIGHT RATIO OF SAID OXYALKYLENE GROUPS TO SAID ALKYL PHENOL-FORMALDEHYDE POLYMER IS IN THE RANGE OF 1:2 TO 15:1, SAID ALKYL PHENOL-FORMALDENHYDE POLYMER CONTAINING 4 TO 15 PHENOLIC NUCLEI, THE QUANTITY OF SULFAMIC ACID BEING SUFFICIENT TO INTRODUCE INTO SAID OXYALKYLATED ALKYL PHENOL-FORMALDEHYDRE POLYMER AT LEAST ONE SULFATE GROUP IN THE FORM OF THE AMMONIUM SALT.
Claim 2
Dependent Claim
110 words
THE OIL SOLUBLE PRODUCT OF THE REACTION OF SULFAMIC ACID WITH AN OXYALKLATED OIL SOLUBLE, ALKALI INSOLUBLE, LINEAR POLYMER OF FORMALDEHYDE AND AN ALKYL PHENOL WHICH IS AT LEAST 75% MONO-ALKYL DIFUNCTION PHENOL WHEREIN THE ALKYL GROUP HAS 4 TO 15 CARBON ATOMS, THE OXYALKYLENE GROUPS CONTAIN 2 TO 3 CARBON ATOMS, AND THE WEIGHT RATIO OF SAID OXYALKYLENE GROUPS TO SAID ALKYL PHENOL-FORMALDEHYDE POLYMER IS IN THE RANGE OF 1:2 TO 15:1, SAID ALKYL PHENOL-FORMALDENHYDE POLYMER CONTAINING 4 TO 15 PHENOLIC NUCLEI, THE QUANTITY OF SULFAMIC ACID BEING SUFFICIENT TO INTRODUCE INTO SAID OXYALKYLATED ALKYL PHENOL-FORMALDEHYDRE POLYMER AT LEAST ONE SULFATE GROUP IN THE FORM OF THE AMMONIUM SALT.
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) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |