Patent US3545136A successfully refreshed from Google Patents.
US3545136A
Expired / Lapsed
US
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Envelope opening apparatus
Assignee: Individual
•
Filing: 1968-06-10
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Granted: 1970-12-08
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Expires: 1988-06-10
Abstract
No abstract record available.
Inventors
- 👤 Luther G Simjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:24
CPC Classifications
B; B43; B43M; B43M7/00; B43M7/001; Y; Y10; Y10S; Y10S83/00; Y10S83/912; Y10T; Y10T83/00; Y10T83/889
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2794304A
Cited
US3488674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |