US2690455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene bis-arylbiguanides and process of preparing same
Assignee: Wyeth Holdings LLC
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Filing: 1952-07-24
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Granted: 1954-09-28
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Expires: 1972-07-24
Abstract
No abstract record available.
Inventors
- 👤 Donald W Kaiser
- 👤 Holm-Hansen Dagfrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:36
CPC Classifications
C; C07; C07C; C07C279/00; C07C279/20; C07C279/24; C07C279/26; C07C279/265; C07C309/00; C07C309/01; C07C309/28; C07C309/45; C07C309/51
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
ETHYLENE BIS-ARYLBIGUANIDES OF THE GROUP CONSISTING OF THE ETHYLENE BIS-PHENYLBIGUANIDES, THE ETHYLENE BIS-ALKYLPHENYLBIGUANIDES, THE ETHYLENE BIS-SULFOPHENYLBIGUANIDES, THE ETHYLENE BIS-LOWER ALKOXYPHENYLBIGUANIDES, THE ETHYLENE BIS-HALOPHENYLBIGUANIDES,AND THE ETHYLENE BISNAPHTHYLBIGUANIDES WITHIN THE FORMULA
Claim 2
Dependent Claim
29 words
ETHYLENE BIS-ARYLBIGUANIDES OF THE GROUP CONSISTING OF THE ETHYLENE BIS-PHENYLBIGUANIDES, THE ETHYLENE BIS-ALKYLPHENYLBIGUANIDES, THE ETHYLENE BIS-SULFOPHENYLBIGUANIDES, THE ETHYLENE BIS-LOWER ALKOXYPHENYLBIGUANIDES, THE ETHYLENE BIS-HALOPHENYLBIGUANIDES,AND THE ETHYLENE BISNAPHTHYLBIGUANIDES WITHIN THE FORMULA
Claim 3
Independent Claim
10 words
THE METHOD OF PREPARING AN ETHYLENE BISARYLBIGUANIDE OF THE FORMULA
Claim 4
Independent Claim
10 words
THE METHOD OF PREPARING AN ETHYLENE BISARYLBIGUANIDE OF 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) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |