Patent US2643423A successfully refreshed from Google Patents.
US2643423A
Expired / Lapsed
US
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Dry wall construction
Assignee: Individual
•
Filing: 1950-12-26
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Granted: 1953-06-30
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Expires: 1970-12-26
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Brendel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:29
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/02; E04F13/04; E04F13/06; E04F13/068; E04F2013/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |