Patent US1920036A successfully refreshed from Google Patents.
US2568071A
Expired / Lapsed
US
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Spring seat construction
Assignee: Individual
•
Filing: 1946-04-25
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Granted: 1951-09-18
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Expires: 1966-04-25
Abstract
No abstract record available.
Inventors
- 👤 Gustave P Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:53
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/70; B60N2/7023; B60N2/7035; B60N2/7047; B60N2/7094
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US126675A
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US1138986A
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US1147771A
Cited
GB261294A
Cited
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Cited
US2155792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |