US3501362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art board of interfitting tapering elements of different colors
Assignee: BROOKS L WALKER
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Filing: 1966-06-16
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Granted: 1970-03-17
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Expires: 1986-06-16
Abstract
No abstract record available.
Inventors
- 👤 Brooks L Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:23
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/22; B44C1/224; B44F; B44F1/00; B44F1/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24521; Y10T428/24537; Y10T428/24802; Y10T428/24934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |