US2557944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ratio scale
Assignee: Individual
•
Filing: 1948-08-10
•
Granted: 1951-06-26
•
Expires: 1968-08-10
Abstract
No abstract record available.
Inventors
- 👤 David K Crook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:09
CPC Classifications
B; B43; B43L; B43L7/00; B43L7/005; B43L13/00; B43L13/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US229777A
Cited
US871333A
Cited
US1062700A
Cited
GB191211267A
Cited
US1199610A
Cited
US1341865A
Cited
US1703736A
Cited
US1797551A
Cited
US2291559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |