US2550555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extruding materials on cores under vacuum
Assignee: AT&T Inc
•
Filing: 1949-05-11
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Granted: 1951-04-24
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Expires: 1969-05-11
Abstract
No abstract record available.
Inventors
- 👤 Cecil A Hallam
- 👤 Ellwood W Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:30
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/03; B29C48/06; B29C48/05; Y; Y10; Y10S; Y10S264/00; Y10S264/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |