US2688998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat attachment
Assignee: Individual
•
Filing: 1951-09-15
•
Granted: 1954-09-14
•
Expires: 1971-09-15
Abstract
No abstract record available.
Inventors
- 👤 Paul W Erickson
- 👤 Mack H Friedmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:26
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/58; B60N2/60; B60N2/6009; B60N2/6018; B60N2/6027; B61; B61D; B61D31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE49143C
Cited
US324839A
Cited
US400131A
Cited
GB191202361A
Cited
US2163198A
Cited
US2227180A
Cited
US2348217A
Cited
US2557874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |