US2378618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for perforating material
Assignee: Celotex Corp
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Filing: 1941-12-19
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Granted: 1945-06-19
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Expires: 1961-12-19
Abstract
No abstract record available.
Inventors
- 👤 George H Burt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:54
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; B; B23; B23B; B23B35/00; B23B35/005; B23B39/00; B23B39/16; B23B39/161; B23B39/163; B27; B27C; B27C3/00; B27C3/04; E04B2001/8457; E04B2001/8476; E04B2001/848; Y; Y10; Y10T; Y10T408/00; Y10T408/29; Y10T408/36; Y10T408/38; Y10T408/3817
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) | 1948-06-18 | 1948-12-18 | 1949-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-06-18 | 1952-12-18 | 1953-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-06-18 | 1956-12-18 | 1957-06-19 | $7700.00 | Window Closed / Lapsed |