US2563309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blackboard compass
Assignee: Individual
•
Filing: 1948-09-20
•
Granted: 1951-08-07
•
Expires: 1968-09-20
Abstract
No abstract record available.
Inventors
- 👤 Sr Jesse Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:56
CPC Classifications
B; B43; B43L; B43L9/00; B43L9/16; B43L9/18; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17291; Y10T279/17316; Y10T279/17324; Y10T279/17333
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US437250A
Cited
US459519A
Cited
US595607A
Cited
GB189705009A
Cited
US702732A
Cited
US1216070A
Cited
US2074102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |