US3019774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Once-through vapor generator
Assignee: DUNWERKE AG
•
Filing: 1959-09-16
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Granted: 1962-02-06
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Expires: 1979-09-16
Abstract
No abstract record available.
Inventors
- 👤 Beyerlein Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:13
CPC Classifications
F; F01; F01K; F01K3/00; F01K3/18; F01K3/20; F01K3/22; F01K9/00; F01K9/04; F22; F22B; F22B35/00; F22B35/06; F22B35/14; Y; Y10; Y10S; Y10S122/00; Y10S122/04
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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |