Patent US2669166A successfully refreshed from Google Patents.
US2669166A
Expired / Lapsed
US
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Method of making asbestos-cement sheets
Assignee: Ruberoid Co
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Filing: 1949-08-16
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Granted: 1954-02-16
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Expires: 1969-08-16
Abstract
No abstract record available.
Inventors
- 👤 Smith Charles Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:57
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/522; B28B1/526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1904812A
Cited
GB189802327A
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US726980A
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US1452379A
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US1544843A
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US1737284A
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US1751866A
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US1819340A
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US1834363A
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US2041880A
Cited
US2276869A
Cited
US2422345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |