Patent US2777204A successfully refreshed from Google Patents.
US2777204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protractor
Assignee: —
•
Filing: —
•
Granted: 1957-01-15
•
Expires: 1974-01-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:39
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/56; G01B3/563
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US759239A
Cited
US1268620A
Cited
US1358604A
Cited
US1661096A
Cited
US2093048A
Cited
US2272491A
Cited
US2239229A
Cited
US2443364A
Cited
US2594574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |