US2588882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensator for capacitors
Assignee: Shell Development Co
•
Filing: 1948-04-27
•
Granted: 1952-03-11
•
Expires: 1968-04-27
Abstract
No abstract record available.
Inventors
- 👤 Francis B Rolfson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:25
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/258; H03; H03L; H03L1/00; H03L1/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 0
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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) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |