Patent US2800890A successfully refreshed from Google Patents.
US2800890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slingshot
Assignee: Individual
•
Filing: 1956-03-07
•
Granted: 1957-07-30
•
Expires: 1976-03-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Starek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:33
CPC Classifications
F; F41; F41B; F41B3/00; F41B3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US463256A
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US570859A
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US829473A
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US931553A
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US1699416A
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US2226308A
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US2528723A
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FR974400A
Cited
US2620061A
Cited
US2601555A
Cited
US2645217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |