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Patent US3443492A successfully refreshed from Google Patents.
US3443492A
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Artificial snow
Assignee: CHARLES M PLEASS
•
Filing: 1966-10-13
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Granted: 1969-05-13
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Expires: 1986-10-13
Abstract
No abstract record available.
Inventors
- 👤 Charles M Pleass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:23
CPC Classifications
B; B44; B44C; B44C5/00; B44C5/06; B29; B29C; B29C67/00; B29C67/02; B29C67/04; B29C67/24; B29C67/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2888418A
Cited
US3020811A
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US3026938A
Cited
US3066580A
Cited
US3112681A
Cited
US3091998A
Cited
US3148169A
Cited
US3291486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |