US2852822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum seal for pressure pouring apparatus
Assignee: Griffin Wheel Co Inc
•
Filing: 1955-08-12
•
Granted: 1958-09-23
•
Expires: 1975-08-12
Abstract
No abstract record available.
Inventors
- 👤 Charles F Strom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:22
CPC Classifications
B; B22; B22D; B22D15/00; B22D15/005; B22D18/00; B22D18/04; Y; Y10; Y10S; Y10S164/00; Y10S164/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |