Patent US2660856A successfully refreshed from Google Patents.
US2660856A
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US
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Balloon guard
Assignee: North American Rayon Corp
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Filing: 1949-09-29
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Granted: 1953-12-01
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Expires: 1969-09-29
Abstract
No abstract record available.
Inventors
- 👤 Chadwick B Kingsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:08
CPC Classifications
D; D01; D01H; D01H1/00; D01H1/14; D01H1/42; D01H1/427
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) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |