US2239133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming closures
Assignee: Individual
•
Filing: 1937-07-02
•
Granted: 1941-04-22
•
Expires: 1957-07-02
Abstract
No abstract record available.
Inventors
- 👤 Harry F Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:24
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/82; B29C66/822; B29C66/8225; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/305; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/346; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/81; B29C66/814; B29C66/8141; B29C66/81431; B29C66/8221; B29C66/8226; B29C66/82265; B29C66/83; B29C66/832; B29C66/8324; B29C66/432; B29C66/4322; B29L; B29L2031/00; B29L2031/712; B29L2031/7128; B31; B31B; B31B70/00; B31B70/60; B31B70/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-04-21 | 1944-10-21 | 1945-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-21 | 1948-10-21 | 1949-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-21 | 1952-10-21 | 1953-04-22 | $7700.00 | Window Closed / Lapsed |