Patent US2703101A successfully refreshed from Google Patents.
US2703101A
Expired / Lapsed
US
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Vacuum control device
Assignee: Individual
•
Filing: 1950-05-20
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Granted: 1955-03-01
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Expires: 1970-05-20
Abstract
No abstract record available.
Inventors
- 👤 Fred C Cantwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:15
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/08; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1324284A
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US971099A
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US1020284A
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GB191318555A
Cited
US1215381A
Cited
US1753536A
Cited
US1764193A
Cited
US1703531A
Cited
US2103118A
Cited
US2075959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |