US3529756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Envelope and apparatus for opening same
Assignee: FMC Corp
•
Filing: 1968-05-02
•
Granted: 1970-09-22
•
Expires: 1988-05-02
Abstract
No abstract record available.
Inventors
- 👤 William W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:13
CPC Classifications
B; B43; B43M; B43M7/00; B65; B65D; B65D27/00; B65D27/32; B65D27/34; Y; Y10; Y10S; Y10S83/00; Y10S83/912; Y10T; Y10T225/00; Y10T225/30; Y10T225/336; Y10T225/343; Y10T225/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2308551A
Cited
US3301116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |