Patent US2831428A successfully refreshed from Google Patents.
US2831428A
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Assignee: Croname Inc
•
Filing: 1956-04-18
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Granted: 1958-04-22
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Expires: 1976-04-18
Abstract
No abstract record available.
Inventors
- 👤 Leroy E Dahlberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:29
CPC Classifications
B; B21; B21H; B21H8/00; B21H8/005; B44; B44B; B44B5/00; B44B5/02; B44B5/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1430418A
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US2736205A
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US763251A
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US907300A
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US1230190A
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US1600692A
Cited
US1670381A
Cited
US2044640A
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US1995973A
Cited
US2315729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |