US2528640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Changeable graduated scale
Assignee: Individual
•
Filing: 1945-09-24
•
Granted: 1950-11-07
•
Expires: 1965-09-24
Abstract
No abstract record available.
Inventors
- 👤 Edwin D Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:05
CPC Classifications
G; G01; G01D; G01D13/00; G01D13/02; G01D13/04; G01D13/10; Y; Y10; Y10S; Y10S116/00; Y10S116/37; Y10S116/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1418495A
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US960946A
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US2019882A
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GB374340A
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US2009209A
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US1929668A
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US2086697A
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US2373168A
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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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |