US3476043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Envelope opening device
Assignee: HAROLD R ERDLEY
•
Filing: 1967-06-07
•
Granted: 1969-11-04
•
Expires: 1987-06-07
Abstract
No abstract record available.
Inventors
- 👤 Harold R Erdley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:20
CPC Classifications
B; B43; B43M; B43M7/00; B43M7/007; Y; Y10; Y10S; Y10S83/00; Y10S83/912; Y10T; Y10T83/00; Y10T83/748; Y10T83/7593; Y10T83/869; Y10T83/8765; Y10T83/8788; Y10T83/8798; Y10T83/8812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US195407A
Cited
US938741A
Cited
US1197788A
Cited
US1833549A
Cited
US2592699A
Cited
DE803269C
Cited
US2679098A
Cited
US3260445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |