US2646683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum and pressure indicator
Assignee: Individual
•
Filing: 1949-02-17
•
Granted: 1953-07-28
•
Expires: 1969-02-17
Abstract
No abstract record available.
Inventors
- 👤 Hugo H Pickron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:26
CPC Classifications
G; G01; G01L; G01L7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US805720A
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US1064555A
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US1201140A
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US1339989A
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US1723548A
Cited
US1956004A
Cited
GB518488A
Cited
US2284588A
Cited
GB553211A
Cited
US2437371A
Cited
US2502776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |