US2428512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making wallboards
Assignee: Individual
•
Filing: 1944-05-10
•
Granted: 1947-10-07
•
Expires: 1964-05-10
Abstract
No abstract record available.
Inventors
- 👤 William G Brubacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:16
CPC Classifications
D; D21; D21J; D21J1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US753038A
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US910245A
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FR380367A
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US937781A
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US1273527A
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US1680896A
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US1872533A
Cited
US1861849A
Cited
US1995145A
Cited
US2127679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |