US2738188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced supporting device illusion
Assignee: WILLIAM E MCCRACKEN
•
Filing: 1951-02-21
•
Granted: 1956-03-13
•
Expires: 1971-02-21
Abstract
No abstract record available.
Inventors
- 👤 Hoffman George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:18
CPC Classifications
A; A47; A47G; A47G25/00; A47G25/74; Y; Y10; Y10S; Y10S248/00; Y10S248/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2532255A
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CH266667A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |