Patent US2925831A successfully refreshed from Google Patents.
US2925831A
Expired / Lapsed
US
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Fabrication of composite surfaces and structures
Assignee: Rock Fabricates and Mining Corp
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Filing: 1956-07-09
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Granted: 1960-02-23
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Expires: 1976-07-09
Abstract
No abstract record available.
Inventors
- 👤 Lloyd G Welty
- 👤 John N Hinkson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:34
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; F; F16; F16L; F16L9/00; F16L9/14; C04B2111/00; C04B2111/00474; C04B2111/0075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1760690A
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US951580A
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US1371684A
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US1512125A
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US1701497A
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US1915814A
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US2140634A
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US2700003A
Cited
US2776674A
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US2758038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |