Patent US2620239A successfully refreshed from Google Patents.
US2620239A
Expired / Lapsed
US
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Spring loaded roller for guiding gasholders or other purposes
Assignee: Individual
•
Filing: 1947-08-05
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Granted: 1952-12-02
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Expires: 1967-08-05
Abstract
No abstract record available.
Inventors
- 👤 Gruenais Adolphe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:14
CPC Classifications
F; F17; F17B; F17B1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US615904A
Cited
GB190218921A
Cited
US879160A
Cited
US1089090A
Cited
US1188810A
Cited
US1464524A
Cited
US2402400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |