Patent US2550862A successfully refreshed from Google Patents.
US2550862A
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Method and apparatus for manufacturing asbestos-cement sheet products
Assignee: Johns Manville Corp
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Filing: 1946-02-23
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Granted: 1951-05-01
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Expires: 1966-02-23
Abstract
No abstract record available.
Inventors
- 👤 Reinecker Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:28
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0448; Y10T83/0467; Y10T83/0505; Y10T83/202; Y10T83/2066; Y10T83/2092; Y10T83/2192; Y10T83/444; Y10T83/4577; Y10T83/4579; Y10T83/525; Y10T83/536
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US267574A
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US896478A
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US1834004A
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US1905837A
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US2125480A
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US2088686A
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US2235960A
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US2352339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |