Patent US2890880A successfully refreshed from Google Patents.
US2890880A
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Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1957-09-20
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Granted: 1959-06-16
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Expires: 1977-09-20
Abstract
No abstract record available.
Inventors
- 👤 Robert W Hompe
- 👤 Robert B Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:25
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1013584A
Cited
US1089745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |