US3381564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic feeding power-operated envelope opener
Assignee: BRUCE W WHITEFORD
•
Filing: 1965-12-08
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Granted: 1968-05-07
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Expires: 1985-12-08
Abstract
No abstract record available.
Inventors
- 👤 Bruce W Whiteford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:21
CPC Classifications
B; B43; B43M; B43M7/00; B43M7/005; Y; Y10; Y10S; Y10S83/00; Y10S83/912; Y10T; Y10T83/00; Y10T83/647; Y10T83/6571; Y10T83/6579; Y10T83/6582; Y10T83/6584; Y10T83/6592
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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |