Patent US2629648A successfully refreshed from Google Patents.
US2629648A
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US
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Impregnated fibrous wallboard and method of making
Assignee: Upson Co
•
Filing: 1949-07-07
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Granted: 1953-02-24
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Expires: 1969-07-07
Abstract
No abstract record available.
Inventors
- 👤 Walter P Ericks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:44
CPC Classifications
D; D21; D21J; D21J1/00; D21J1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1857690A
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US2050197A
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US2155731A
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US2190331A
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US2185477A
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US2358387A
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US2417014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |