Patent US2876236A successfully refreshed from Google Patents.
US2876236A
Expired / Lapsed
US
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Heterocyclic diamines and salts thereof
Assignee: Wyeth LLC
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Filing: 1956-01-18
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Granted: 1959-03-03
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Expires: 1976-01-18
Abstract
No abstract record available.
Inventors
- 👤 Szabo Joseph Lester
- 👤 William F Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
AS NEW COMPOUNDS, THE WATER-SOLUBLE, LOWER ALIPHATIC ACID-ADDITION SALTS OF AN ALKYLENE DIAMINE HAVING THE FORMULA
Claim 2
Dependent Claim
16 words
AS NEW COMPOUNDS, THE WATER-SOLUBLE, LOWER ALIPHATIC ACID-ADDITION SALTS OF AN ALKYLENE DIAMINE HAVING THE FORMULA
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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |