US2638263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible bag for vacuum sealing
Assignee: DUO VENT VACUUM CLOSURE COMPAN
•
Filing: 1949-05-20
•
Granted: 1953-05-12
•
Expires: 1969-05-20
Abstract
No abstract record available.
Inventors
- 👤 Charles J Jesnig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
B; B65; B65D; B65D77/00; B65D77/22; B65D77/225; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1760959A
Cited
US2051023A
Cited
US2241943A
Cited
US2173571A
Cited
US2225395A
Cited
US2398477A
Cited
US2437693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |