US2520449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent protective and display envelope
Assignee: Individual
•
Filing: 1947-03-06
•
Granted: 1950-08-29
•
Expires: 1967-03-06
Abstract
No abstract record available.
Inventors
- 👤 Amcs F Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:59
CPC Classifications
B; B65; B65D; B65D65/00; B65D65/02; B65D65/04; B65D65/06; B65D27/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US590795A
Cited
US591415A
Cited
US680368A
Cited
US1330259A
Cited
US2149030A
Cited
US2335159A
Cited
US2364870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |