US2779252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making boardlike products from a fibrous cement mixture
Assignee: Filtrox Werk AG
•
Filing: 1953-05-11
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Granted: 1957-01-29
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Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Welz Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:26
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/528; B28B1/526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB103843A
Cited
US1463961A
Cited
US1834648A
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US1973722A
Cited
US2276083A
Cited
US2178631A
Cited
US2422345A
Cited
GB554132A
Cited
US2401663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |