Patent US2873918A successfully refreshed from Google Patents.
US2873918A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1954-08-23
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Granted: 1959-02-17
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Expires: 1974-08-23
Abstract
No abstract record available.
Inventors
- 👤 Harry H Rosebrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:53
CPC Classifications
E; E01; E01B; E01B11/00; E01B11/42; G; G01; G01G; G01G19/00; G01G19/02; G01G19/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US283632A
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US877279A
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US892328A
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US1009250A
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US1090949A
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US1124554A
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US1365105A
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US1854361A
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US2013228A
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US2204395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |