US2448173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow article and method of making same
Assignee: Individual
•
Filing: 1943-05-20
•
Granted: 1948-08-31
•
Expires: 1963-05-20
Abstract
No abstract record available.
Inventors
- 👤 Frank V Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/01; B29C66/32; B29C66/328; B29C66/3282; B29C37/00; B29C37/02; B29C37/04; B29C51/00; B29C51/08; B29C65/00; B29C65/02; B29C65/18; B29C66/05; B29C66/10; B29C66/13; B29C66/131; B29C66/1312; B29C66/326; B29C66/50; B29C66/51; B29C66/54; B29C66/80; B29C66/81; B29C66/816; B29C66/8161; B29C66/83; B29C66/832; B29C66/8322; B29C66/70; B29C66/71; B29L; B29L2031/00; B29L2031/54; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1052; Y10T156/108
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |