US2472756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partition structure
Assignee: United States Gypsum Co
•
Filing: 1943-11-23
•
Granted: 1949-06-07
•
Expires: 1963-11-23
Abstract
No abstract record available.
Inventors
- 👤 Nelsson Nels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:44
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/84; E04B2/842; E04B2/72; E04B2/723; E04B2/86; E04B2002/8688; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44017; Y10T24/44983; Y10T24/44991
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US681728A
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US1933476A
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US2038115A
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US2012203A
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US2126309A
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US2127837A
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GB540302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |