Patent US2078620A successfully refreshed from Google Patents.
US2078620A
Expired / Lapsed
US
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Wall construction
Assignee: National Gypsum Co
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Filing: 1933-08-14
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Granted: 1937-04-27
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Expires: 1953-08-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Venzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:19
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/82; E04B2/821; E04B2/822; E04B2/76; E04B2/78; E04B2/7854
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-04-26 | 1940-10-26 | 1941-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-04-26 | 1944-10-26 | 1945-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-04-26 | 1948-10-26 | 1949-04-27 | $7700.00 | Window Closed / Lapsed |