US2557291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirit level holder
Assignee: Individual
•
Filing: 1946-02-20
•
Granted: 1951-06-19
•
Expires: 1966-02-20
Abstract
No abstract record available.
Inventors
- 👤 Richard T Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:37
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01C9/26; G01C9/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US523023A
Cited
US876720A
Cited
US908406A
Cited
US1050610A
Cited
US1177131A
Cited
US1348742A
Cited
US1738791A
Cited
US1815949A
Cited
US2223683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |