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Patent US2832587A successfully refreshed from Google Patents.
US2832587A
Expired / Lapsed
US
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Spring booster assemblies
Assignee: UNIVERSAL AIR LIFT Inc
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Filing: 1955-06-06
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Granted: 1958-04-29
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Expires: 1975-06-06
Abstract
No abstract record available.
Inventors
- 👤 Maurice L Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:52
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/04; F16F1/12; F16F1/13; F16F13/00; F16F13/005; F16F13/007; F16F2222/00; F16F2222/12; F16F2222/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |