US2721737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collating machine
Assignee: Individual
•
Filing: 1952-05-23
•
Granted: 1955-10-25
•
Expires: 1972-05-23
Abstract
No abstract record available.
Inventors
- 👤 Marvin H Hammer
- 👤 Lyle V Dutro
- 👤 Sherman H Hewson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:45
CPC Classifications
B; B65; B65H; B65H37/00; B65H37/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1306399A
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US1392469A
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US1046095A
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US1717231A
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US1853320A
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US2007886A
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US2255777A
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US2300657A
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US2288755A
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US2392976A
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US2568224A
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US2558405A
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US2621040A
Cited
US2627406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |