US2415425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum chamber
Assignee: Guardite Corp
•
Filing: 1945-06-11
•
Granted: 1947-02-11
•
Expires: 1965-06-11
Abstract
No abstract record available.
Inventors
- 👤 Arnold H Heineman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:05
CPC Classifications
B; B01; B01L; B01L1/00; B01L1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US522105A
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US962710A
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US1269197A
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US1518668A
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US1637871A
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US1787101A
Cited
US1984007A
Cited
US2119438A
Cited
AU1780234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-10 | 1950-08-12 | 1951-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-10 | 1954-08-12 | 1955-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-10 | 1958-08-12 | 1959-02-11 | $7700.00 | Window Closed / Lapsed |