US3454081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface for boiling liquids
Assignee: Union Carbide Corp
•
Filing: 1968-05-14
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Granted: 1969-07-08
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Expires: 1988-05-14
Abstract
No abstract record available.
Inventors
- 👤 Leslie C Kun
- 👤 Alfred M Czikk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:49
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/18; F28F13/185; F28F13/187; F22; F22B; F22B37/00; F22B37/02; Y; Y10; Y10S; Y10S165/00; Y10S165/911; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |