Patent US3131228A successfully refreshed from Google Patents.
Patent US3538529A successfully refreshed from Google Patents.
US3538529A
Expired / Lapsed
US
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Aircraft loading equipment
Assignee: Dorr Oliver Inc
•
Filing: 1968-12-23
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Granted: 1970-11-10
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Expires: 1988-12-23
Abstract
No abstract record available.
Inventors
- 👤 Morton A Breier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:36
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/30; B64F1/305; B64F1/3055; E; E05; E05Y; E05Y2900/00; E05Y2900/40; E05Y2900/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1882512A
Cited
US2700169A
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US2875457A
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US3184772A
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US3046908A
Cited
US3110048A
Cited
US3099847A
Cited
US3317942A
Cited
US3462787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |