US2584538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6 and 7-bromomethyl pteridines and process of preparing same
Assignee: Wyeth Holdings LLC
•
Filing: 1948-06-24
•
Granted: 1952-02-05
•
Expires: 1968-06-24
Abstract
No abstract record available.
Inventors
- 👤 James H Boothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:02
CPC Classifications
C; C07; C07D; C07D475/00; C07D475/02; C07D475/04
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
8 words
A METHOD OF PREPARING COMPOUNDS HAVING THE FORMULA:
Claim 4
Independent Claim
8 words
A METHOD OF PREPARING COMPOUNDS HAVING THE FORMULA:
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) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |