Patent US449136A successfully refreshed from Google Patents.
Patent US2829122A successfully refreshed from Google Patents.
US2829122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation products of sulfonic acid, aliphatic aldehyde and o-chloro-phenol and prcess of preparation
Assignee: Bayer AG
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Filing: 1953-06-09
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Granted: 1958-04-01
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Expires: 1973-06-09
Abstract
No abstract record available.
Inventors
- 👤 Schultheis Heinrich
- 👤 Delfs Detlef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:32
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/08; C14C3/18; C14C3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE PROCESS OF PREPARING WATER-SOLUBLE CONDENSATION PRODUCTS SUITABLE FOR TANNING WHICH COMPRISES SIMULTANEOUSLY INTRODUCING AT 80-130*C. 0.4-2 MOLS OF FORMALDEHYDE AND 0.1-2 MOLS OF O-CHLOROPHENOL INTO 1 MOL OF A SULFONATION MIXTURE OF NAPHTHALENE PREPARED BY TREATING NAPHTHALENE WITH SULFONIC ACID AT A TEMPERATURE OF ABOUT 140-180*C., SAID MIXTURE CONSISTING OF NAPHTHALENE MONOSULFONIC ACIDS AND NAPHTHALENE DISULFONIC ACIDS, HEATING THE MIXTURE FOR ABOUT ANOTHER 15 MINUTES TO 4 HOURS AT 80-130*C., ADJUSTING THE PRODUCT TO A PH OF ABOUT 3-4 AND RECOVERING THE CONDENSATION PRODUCT.
Claim 2
Dependent Claim
85 words
THE PROCESS OF PREPARING WATER-SOLUBLE CONDENSATION PRODUCTS SUITABLE FOR TANNING WHICH COMPRISES SIMULTANEOUSLY INTRODUCING AT 80-130*C. 0.4-2 MOLS OF FORMALDEHYDE AND 0.1-2 MOLS OF O-CHLOROPHENOL INTO 1 MOL OF A SULFONATION MIXTURE OF NAPHTHALENE PREPARED BY TREATING NAPHTHALENE WITH SULFONIC ACID AT A TEMPERATURE OF ABOUT 140-180*C., SAID MIXTURE CONSISTING OF NAPHTHALENE MONOSULFONIC ACIDS AND NAPHTHALENE DISULFONIC ACIDS, HEATING THE MIXTURE FOR ABOUT ANOTHER 15 MINUTES TO 4 HOURS AT 80-130*C., ADJUSTING THE PRODUCT TO A PH OF ABOUT 3-4 AND RECOVERING THE CONDENSATION PRODUCT.
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) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |