Patent US2964819A successfully refreshed from Google Patents.
US2964819A
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US
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Apparatus for and method of fissuring the surface of a moving layer of wetfibrous mix capable of having fissures formed therein
Assignee: Johns Manville Corp
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Filing: 1957-08-09
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Granted: 1960-12-20
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Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
- 👤 Robert U Toms
- 👤 Allen J Grose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:26
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/08; B28B11/0818; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1100989A
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US1454731A
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US1580153A
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US2015084A
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US2245426A
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US2650408A
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US2458564A
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US2756459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |