US2843564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation products
Assignee: Bayer AG
•
Filing: 1954-12-07
•
Granted: 1958-07-15
•
Expires: 1974-12-07
Abstract
No abstract record available.
Inventors
- 👤 Schultheis Heinz
- 👤 Delfs Detlef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:49
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/18; C14C3/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
AS NEW PRODUCTS THE WATER-SOLUBLE CONDENSATION PRODUCTS FROM 1 MOL OF SULFONIC ACIDS OF AROMATIC HYDROCARBONS CONTAINING AT LEAST TWO CONDENSED NUCLEI, SAID SULFONIC ACIDS BEING SELECTED FROM THE GROUP CONSISTING OF MONOSULFONIC ACIDS, DISULFONIC ACIDS AND MIXTURES THEREOF, 0.2-3 MOL OF A SATURATED LOWER ALIPHATIC ALDEHYDE AND 0.1-1.5 MOL OF AN O-CHLOROPHENOL IN WHICH AT LEAST ONE OF THE RING POSITIONS O- AND P- IS A FREE POSITION, AND 0.1-1 MOL OF ANOTHER SUBSTITUTED PHENOL SELECTED FROM THE GROUP CONSISTING OF A P-CHLOROPHENOL, NITROPHENOLS, 3-CHLORO-4-NITROPHENOL, SALICYCLIC ACID METHYL ESTER, B-NAPHTHOL, 1,3-XYLENOL-4, 1,4-XYLENOL-5, AND 1,2-XYLENOL3, SAID CONDENSATION PRODUCTS HAVING BEEN PREPARED BY CONDUCTING THE CONDENSATION IN A STRONGLY-ACID MEDIUM UNTIL THE RESULTING PRODUCTS ARE WATER-SOLUBLE.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |