US2408488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of perforating gypsum lath
Assignee: Celotex Corp
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Filing: 1941-08-27
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Granted: 1946-10-01
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Expires: 1961-08-27
Abstract
No abstract record available.
Inventors
- 👤 Louis N Sorensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:24
CPC Classifications
B; B26; B26D; B26D5/00; B26D5/20; B26D5/22; B26F; B26F1/00; B26F1/02; B28; B28B; B28B11/00; B28B11/12; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0448; Y10T83/0524; Y10T83/0577; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2122; Y10T83/2127
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) | 1949-09-30 | 1950-04-01 | 1950-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-30 | 1954-04-01 | 1954-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-30 | 1958-04-01 | 1958-10-01 | $7700.00 | Window Closed / Lapsed |