US2453889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heat sealing the seams of paper bags
Assignee: WESTERN WAXED PAPER Co
•
Filing: 1944-03-07
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Granted: 1948-11-16
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Expires: 1964-03-07
Abstract
No abstract record available.
Inventors
- 👤 Albert M Bojanower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:14
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/10; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/70; B29C66/71; B29C66/72; B29C66/723; B29C66/7232; B29C66/72327; B29C66/72328; B29C66/80; B29C66/432; B29C66/4322; B31; B31B; B31B70/00; B31B70/60; B31B70/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2084625A
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US2157732A
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US2103945A
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US2358455A
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US2289618A
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US2293568A
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US2367725A
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US2372737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |