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US2638821A
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Assignee: Individual
•
Filing: 1950-07-12
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Granted: 1953-05-19
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Expires: 1970-07-12
Abstract
No abstract record available.
Inventors
- 👤 John R Baumgartner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:24
CPC Classifications
B; B65; B65H; B65H20/00; B65H20/02; B65H20/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US844350A
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US1025894A
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US1289679A
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US1244708A
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US1301072A
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GB252220A
Cited
US2147223A
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US2320659A
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US2454021A
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US2499699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |