Patent US2887790A successfully refreshed from Google Patents.
US2887790A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1955-09-01
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Granted: 1959-05-26
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Expires: 1975-09-01
Abstract
No abstract record available.
Inventors
- 👤 Bertha H Hills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:10
CPC Classifications
G; G09; G09B; G09B21/00; G09B21/001; G09B21/002; B; B42; B42D; B42D19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US427020A
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US515605A
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US125024A
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US1013868A
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DE373342C
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FR808779A
Cited
US2099306A
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US2145780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |