US2614757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuously delivering plastic cementitious material to a moving molding surface
Assignee: National Gypsum Co
•
Filing: 1948-09-03
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Granted: 1952-10-21
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Expires: 1968-09-03
Abstract
No abstract record available.
Inventors
- 👤 Elgin G O'farrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:17
CPC Classifications
B; B28; B28B; B28B13/00; B28B13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US779164A
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US907625A
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GB191412863A
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US1230820A
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US1268219A
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US1607827A
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US1702729A
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US1813828A
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US1908658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |