US2872703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion apparatus
Assignee: AT&T Inc
•
Filing: 1955-01-24
•
Granted: 1959-02-10
•
Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Richard D Gambrill
- 👤 Alvin N Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:04
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/22; B21C23/24; B21C23/26; B21C23/30; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/15; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/36; B29C48/395
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2704380A
Cited
US2622469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |