US2988063A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam generator
Assignee: Individual
•
Filing: 1958-12-17
•
Granted: 1961-06-13
•
Expires: 1978-12-17
Abstract
No abstract record available.
Inventors
- 👤 Vorkauf Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:31
CPC Classifications
F; F22; F22B; F22B21/00; F22B21/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1729259A
Cited
US2563489A
Cited
US1154910A
Cited
US1930688A
Cited
US2204350A
Cited
GB762851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |