Patent US2741956A successfully refreshed from Google Patents.
US2741956A
Expired / Lapsed
US
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Machines for making bags, envelopes or similar containers
Assignee: Frank Hamachek Machine Co Inc
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Filing: 1950-08-12
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Granted: 1956-04-17
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Expires: 1970-08-12
Abstract
No abstract record available.
Inventors
- 👤 Parke H Diffenbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:58
CPC Classifications
B; B31; B31B; B31B70/00; B31B2155/00; B31B2155/001; B31B2155/0012; B31B2160/00; B31B2160/10; B31B2160/106; B31B70/26; B31B70/262; B31B70/266; B31B70/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227497A
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US2205005A
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US2275976A
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US2347902A
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US2340510A
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US2362460A
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US2532784A
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US2577386A
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US2490930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |