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Patent US3461835A successfully refreshed from Google Patents.
US3461835A
Expired / Lapsed
US
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Water-activated balloon inflating device
Assignee: Lionel Hellier Ltd
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Filing: 1967-11-17
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Granted: 1969-08-19
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Expires: 1987-11-17
Abstract
No abstract record available.
Inventors
- 👤 Michael Henry Cockbill
- 👤 James Thomas Main
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:18
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/22; B63C9/23; B63C9/08; B63C9/18
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) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |