US2745181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting compass
Assignee: Individual
•
Filing: 1953-01-27
•
Granted: 1956-05-15
•
Expires: 1973-01-27
Abstract
No abstract record available.
Inventors
- 👤 John F Czerniewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:30
CPC Classifications
B; B43; B43L; B43L9/00; B43L9/16; B43L9/18; Y; Y10; Y10T; Y10T403/00; Y10T403/71; Y10T403/7129; Y10T403/7141; Y10T403/7194
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US515075A
Cited
US540809A
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DE383817C
Cited
GB189809445A
Cited
US801789A
Cited
US1190502A
Cited
FR831503A
Cited
US2612690A
Cited
US2575917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |