US2602228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protractor
Assignee: Individual
•
Filing: 1950-11-07
•
Granted: 1952-07-08
•
Expires: 1970-11-07
Abstract
No abstract record available.
Inventors
- 👤 William D Webber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:36
CPC Classifications
G; G01; G01C; G01C11/00; G01B; G01B3/00; G01B3/56; G01B3/563
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1409303A
Cited
US918947A
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US1346273A
Cited
US1362683A
Cited
US1637933A
Cited
US2190071A
Cited
US2216490A
Cited
US2397002A
Cited
US2471327A
Cited
US2476338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |