US3443389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of carbon dioxide snow
Assignee: Airco Inc
•
Filing: 1966-12-27
•
Granted: 1969-05-13
•
Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Palmer W Townsend
- 👤 William B Laird
- 👤 Albert Halfon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:25
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/50; C01B32/55
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR514037A
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GB304958A
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FR642057A
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US1974478A
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US1976777A
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US1920124A
Cited
DE643119C
Cited
US2100151A
Cited
GB423290A
Cited
GB477587A
Cited
GB932559A
Cited
GB890062A
Cited
US3035633A
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 |