US2921422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evacuating and sealing mechanism
Assignee: Individual
•
Filing: 1954-06-04
•
Granted: 1960-01-19
•
Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Lloyd S Sprinkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:00
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/40; B29C65/42; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C65/483; B29C65/4835; B29C65/52; B29C65/54; B29C65/78; B29C66/00; B29C66/001; B29C66/50; B29C66/51; B29C66/54; B29C66/545; F; F16; F16K; F16K24/00; B29C66/53; B29C66/534; B29C66/5344; B29C66/5346; B29L; B29L2024/00; B29L2031/00; B29L2031/712; B29L2031/7158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |