US2803351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit type bookstack
Assignee: Unisys Corp
•
Filing: 1952-12-12
•
Granted: 1957-08-20
•
Expires: 1972-12-12
Abstract
No abstract record available.
Inventors
- 👤 Richard C Van Wiggeren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:19
CPC Classifications
A; A47; A47B; A47B47/00; A47B47/02; A47B47/021; A47B47/022; A47B47/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1030472A
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US1165566A
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US1164439A
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US1380570A
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US1897187A
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US1778982A
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US1951202A
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GB379594A
Cited
US2064899A
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US2346150A
Cited
US2414334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |