Patent US2832718A successfully refreshed from Google Patents.
US2832718A
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Tetracycline compositions containing tetracycline organic sulfonic acid dye salt and methods for preparing same
Assignee: Wyeth Holdings LLC
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Filing: 1956-01-26
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Granted: 1958-04-29
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Expires: 1976-01-26
Abstract
No abstract record available.
Inventors
- 👤 Weidenheimer Joseph Francis
- 👤 Reed Charles Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:24
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
AN AQUEOUS SUSPENSION CONTAINING A MAJOR PROPORTION OF TETRACYCLINE AND COLORED BY A MINOR PROPORTION OF A PREFORMED SALT OF TETRACYCLINE WITH AN ORGANIC SULFONIC ACID DYE.
Claim 2
Dependent Claim
27 words
AN AQUEOUS SUSPENSION CONTAINING A MAJOR PROPORTION OF TETRACYCLINE AND COLORED BY A MINOR PROPORTION OF A PREFORMED SALT OF TETRACYCLINE WITH AN ORGANIC SULFONIC ACID DYE.
References Cited (Backward Citations)
US2649480A
Cited
GB714085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |