US2431618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyer
Assignee: AT&T Inc
•
Filing: 1945-12-21
•
Granted: 1947-11-25
•
Expires: 1965-12-21
Abstract
No abstract record available.
Inventors
- 👤 Vincent A Rayburn
- 👤 Duer C Robson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:20
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/52; B65G47/60; B65G47/61
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) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |