US3496752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface for boiling liquids
Assignee: Union Carbide Corp
•
Filing: 1968-03-08
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Granted: 1970-02-24
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Expires: 1988-03-08
Abstract
No abstract record available.
Inventors
- 👤 Leslie C Kun
- 👤 Alfred M Czikk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:02
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/18; F28F13/185; F28F13/187; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21D; B21D53/00; B21D53/02; F28F1/00; F28F1/10; F28F1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US925028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |