Patent US3428276A successfully refreshed from Google Patents.
US3428276A
Expired / Lapsed
US
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Airborne spraying device
Assignee: Okanagan Copter Sprays Ltd
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Filing: 1967-09-25
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Granted: 1969-02-18
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Expires: 1987-09-25
Abstract
No abstract record available.
Inventors
- 👤 Albert W Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:22
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |