Patent US2444685A successfully refreshed from Google Patents.
US2444685A
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Multiple fabrication method and apparatus for liquid-tight envelope bags
Assignee: Individual
•
Filing: 1942-05-06
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Granted: 1948-07-06
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Expires: 1962-05-06
Abstract
No abstract record available.
Inventors
- 👤 Harry F Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:40
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/60; B31B70/64; B31B70/645; B31B2155/00; B31B2155/001; B31B2155/0014; B31B2160/00; B31B2160/10; B31B2160/106; B31B70/14; B31B70/16; B31B70/18; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1067; Y10T156/1069; Y10T156/1084; Y10T156/1087; Y10T156/12; Y10T156/1317
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1948570A
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US2125758A
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US2224513A
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US2195583A
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US2347439A
Cited
US2265075A
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US2326931A
Cited
US2272530A
Cited
US2301771A
Cited
US2343117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |