Patent US2431610A successfully refreshed from Google Patents.
US2431610A
Expired / Lapsed
US
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Mast
Assignee: Individual
•
Filing: 1945-04-10
•
Granted: 1947-11-25
•
Expires: 1965-04-10
Abstract
No abstract record available.
Inventors
- 👤 Cohen Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:54
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/02; E04H12/08; E04H12/10; Y; Y10; Y10T; Y10T403/00; Y10T403/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US349049A
Cited
US471373A
Cited
US811435A
Cited
US868942A
Cited
US1955074A
Cited
US2157500A
Cited
US2194810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |