US2802884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation-dealkylation catalysts
Assignee: Beazer East Inc
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Filing: 1952-05-31
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Granted: 1957-08-13
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Expires: 1972-05-31
Abstract
No abstract record available.
Inventors
- 👤 Alelio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:44
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/10; C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C37/16; C07C37/18; C07C37/48; C07C37/50; B01J2231/00; B01J2231/40; B01J2231/42; B01J2231/4205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR THE ALKYLATION OF A PHENOLIC COMPOUND FREE OF PARA SUBSTITUTION AND SUSCEPTIBLE OF ORTHO ALKYLATION TO PRODUCE A PREPONDERANCE OF ORTHO ALKYLATED PRODUCT SELECTED FROM THE GROUP CONSISTING OF PHENOL, RESORCINOL, CATECHOL, CRESOLS, XYLENOLS, AND NAPHTHOLS, COMPRISING THE STEP OF ALKYLATING SAID COMPOUND EMPLOYING TERTIARY-BUTYL-ALCOHOL AS ALKYLATING AGENT IN THE PRESENCE OF A FUSIBLE, AQUEOUS-ALKALI-SOLUBLE LOW MOLECULAR WEIGHT POLYMER HAVING SULFONIC ACID GROUPS THEREIN SELECTED FROM THE GROUP CONSISTING OF A SULFONATED PHENOL-FORMALDEHYDE POLYMER CONTAINING IN THE POLYMER MOLECULE, BEFORE SULFONATION, PHENOLIC GROUPS AND METHYLENE GROUPS DERIVED FROM FORMALDEHYDE IN A MOLAR RATIO AT LEAST EQUAL TO 3/2, AND A SULFONATED POLYSTYRENE HAVING A MOLECULAR WEIGHT IN THE RANGE 1,000-60,000.
Claim 2
Dependent Claim
113 words
A PROCESS FOR THE ALKYLATION OF A PHENOLIC COMPOUND FREE OF PARA SUBSTITUTION AND SUSCEPTIBLE OF ORTHO ALKYLATION TO PRODUCE A PREPONDERANCE OF ORTHO ALKYLATED PRODUCT SELECTED FROM THE GROUP CONSISTING OF PHENOL, RESORCINOL, CATECHOL, CRESOLS, XYLENOLS, AND NAPHTHOLS, COMPRISING THE STEP OF ALKYLATING SAID COMPOUND EMPLOYING TERTIARY-BUTYL-ALCOHOL AS ALKYLATING AGENT IN THE PRESENCE OF A FUSIBLE, AQUEOUS-ALKALI-SOLUBLE LOW MOLECULAR WEIGHT POLYMER HAVING SULFONIC ACID GROUPS THEREIN SELECTED FROM THE GROUP CONSISTING OF A SULFONATED PHENOL-FORMALDEHYDE POLYMER CONTAINING IN THE POLYMER MOLECULE, BEFORE SULFONATION, PHENOLIC GROUPS AND METHYLENE GROUPS DERIVED FROM FORMALDEHYDE IN A MOLAR RATIO AT LEAST EQUAL TO 3/2, AND A SULFONATED POLYSTYRENE HAVING A MOLECULAR WEIGHT IN THE RANGE 1,000-60,000.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |