US2440936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel wall construction
Assignee: Celotex Corp
•
Filing: 1943-04-08
•
Granted: 1948-05-04
•
Expires: 1963-04-08
Abstract
No abstract record available.
Inventors
- 👤 Elmendorf Armin
- 👤 Lieff Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:28
CPC Classifications
E; E04; E04F; E04F19/00; E04F19/02; E04F19/06; E04F19/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1660834A
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US1357350A
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US1559134A
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US1672099A
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US2031275A
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GB436415A
Cited
US2109448A
Cited
US2093261A
Cited
US2240256A
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US2391052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |