Patent US2535635A successfully refreshed from Google Patents.
US2535635A
Expired / Lapsed
US
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Substituted pyrimidines and preparation of the same
Assignee: Wyeth Holdings LLC
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Filing: 1948-08-03
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Granted: 1950-12-26
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Expires: 1968-08-03
Abstract
No abstract record available.
Inventors
- 👤 Martin E Hultquist
- 👤 Aloysius J Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:20
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/42; C07D239/69; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/50; C07D277/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA
Claim 3
Independent Claim
26 words
A METHOD OF PREPARING N-(4,6-DIMETHYL-2PRYIMIDYL)-1-PHENOL-4-SULFONAMIDE WHICH COMPRISES THE STEP OF TREATING N-(4,6-DIMETHYL-2PRYIMIDYL)-1-CARBETHOXYOXYBENZENE-4-SULFONAMIDE WITH A HYDROLYZING AGENT UNTIL N-(4,6-DIMETHYL-2-PYRIMIDYL)-1-PHENOL-4-SULFONAMIDE IS FORMED AND THEREAFTER RECOVERING THE SAID PRODUCT.
Claim 4
Independent Claim
26 words
A METHOD OF PREPARING N-(4,6-DIMETHYL-2PRYIMIDYL)-1-PHENOL-4-SULFONAMIDE WHICH COMPRISES THE STEP OF TREATING N-(4,6-DIMETHYL-2PRYIMIDYL)-1-CARBETHOXYOXYBENZENE-4-SULFONAMIDE WITH A HYDROLYZING AGENT UNTIL N-(4,6-DIMETHYL-2-PYRIMIDYL)-1-PHENOL-4-SULFONAMIDE IS FORMED AND THEREAFTER RECOVERING THE SAID PRODUCT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |