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US2728442A
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Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1950-09-22
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Granted: 1955-12-27
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Expires: 1970-09-22
Abstract
No abstract record available.
Inventors
- 👤 Alten E Whitecar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:23
CPC Classifications
A; A61; A61J; A61J7/00; A61J7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1862351A
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US2028218A
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US2108163A
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US2065319A
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US2103387A
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US2523517A
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US2594337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |