US2990578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined safety and material handling device
Assignee: AT&T Inc
•
Filing: 1960-06-07
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Granted: 1961-07-04
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Expires: 1980-06-07
Abstract
No abstract record available.
Inventors
- 👤 Frank M Adair
- 👤 Gerhard E Hoenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:27
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/84; B29C45/1769; B29C31/00; Y; Y10; Y10S; Y10S425/00; Y10S425/045; Y10T; Y10T74/00; Y10T74/21; Y10T74/219; Y10T74/2191
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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |