US2587284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material ejecting and feeding apparatus
Assignee: AT&T Inc
•
Filing: 1950-04-12
•
Granted: 1952-02-26
•
Expires: 1970-04-12
Abstract
No abstract record available.
Inventors
- 👤 Robert F Brewer
- 👤 Clifford W Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:15
CPC Classifications
B; B29; B29C; B29C31/00; B29C31/04; Y; Y10; Y10S; Y10S118/00; Y10S118/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2218071A
Cited
US2123354A
Cited
US2029922A
Cited
US2081758A
Cited
GB461386A
Cited
US2296861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |