US2573722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1946-12-30
•
Granted: 1951-11-06
•
Expires: 1966-12-30
Abstract
No abstract record available.
Inventors
- 👤 Frank W Maurer
- 👤 Jack B Hirschmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:34
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/02; A61F9/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1225548A
Cited
US1258097A
Cited
US1816752A
Cited
US2268049A
Cited
US2288054A
Cited
US2409286A
Cited
US2422534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |