US2783210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-biguanides as stabilizing agents
Assignee: Wyeth Holdings LLC
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Filing: 1953-08-06
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Granted: 1957-02-26
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Expires: 1973-08-06
Abstract
No abstract record available.
Inventors
- 👤 George W Kennerly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:26
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/228; C10L1/2283; C07; C07C; C07C279/00; C07C279/20; C07C279/24; C07C279/26; C07C279/265; C11; C11B; C11B5/00; C11B5/0042; C11D; C11D9/00; C11D9/04; C11D9/045; C11D9/22; C11D9/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
AS A NEW COMPOUND, A POLYMETHYLENE BIS-BIGUANIDE WHEREIN THE POLYMETHYLENE RADICAL CONTAINS UP TO FOUR CARBON ATOMS AND EACH BIGUANIDE RADICAL CONTAINS A HYDROCARBON ARYL RADICAL.
Claim 2
Dependent Claim
26 words
AS A NEW COMPOUND, A POLYMETHYLENE BIS-BIGUANIDE WHEREIN THE POLYMETHYLENE RADICAL CONTAINS UP TO FOUR CARBON ATOMS AND EACH BIGUANIDE RADICAL CONTAINS A HYDROCARBON ARYL RADICAL.
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) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |