US2843230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building construction
Assignee: United States Gypsum Co
•
Filing: 1953-12-07
•
Granted: 1958-07-15
•
Expires: 1973-12-07
Abstract
No abstract record available.
Inventors
- 👤 Nelsson Nels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:23
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/12; E04B9/16; Y; Y10; Y10T; Y10T403/00; Y10T403/71; Y10T403/7117; Y10T403/7176
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191320262A
Cited
US1252781A
Cited
FR499120A
Cited
US1454254A
Cited
US1929302A
Cited
US1984028A
Cited
US2447694A
Cited
US2648102A
Cited
US2767440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |