Patent US2398632A successfully refreshed from Google Patents.
US2398632A
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Building element
Assignee: United States Gypsum Co
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Filing: 1944-05-08
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Granted: 1946-04-16
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Expires: 1964-05-08
Abstract
No abstract record available.
Inventors
- 👤 Orcutt W Frost
- 👤 James H Conover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:23
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/52; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/16; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/16; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/24996; Y10T428/31504; Y10T428/31652; Y10T428/31815
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) | 1949-04-15 | 1949-10-15 | 1950-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-15 | 1953-10-15 | 1954-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-15 | 1957-10-15 | 1958-04-16 | $7700.00 | Window Closed / Lapsed |