Patent US2542403A successfully refreshed from Google Patents.
US2542403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
engstrom
Assignee: —
•
Filing: —
•
Granted: 1951-02-20
•
Expires: 1968-02-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:52
CPC Classifications
G; G06; G06C; G06C11/00; G06C11/02; G06C15/00; G06C15/04; G06C15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1477116A
Cited
US1797995A
Cited
US1932670A
Cited
US1932621A
Cited
US2130723A
Cited
US2158142A
Cited
US910853A
Cited
US1078359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |