Patent US3892508A successfully refreshed from Google Patents.
Patent US2597965A successfully refreshed from Google Patents.
Patent US2057764A successfully refreshed from Google Patents.
Patent US1864341A successfully refreshed from Google Patents.
US1864341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draftsman s vernier protractor
Assignee: —
•
Filing: —
•
Granted: 1932-06-21
•
Expires: 1949-06-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:59
CPC Classifications
B; B43; B43L; B43L7/00; B43L7/10; B43L7/12; G; G01; G01B; G01B3/00; G01B3/56; G01B3/563
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-06-21 | 1935-12-21 | 1936-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-06-21 | 1939-12-21 | 1940-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-06-21 | 1943-12-21 | 1944-06-21 | $7700.00 | Window Closed / Lapsed |