US3443548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature and high pressure steam generator
Assignee: HENRY VOGT MACHINE CO Inc
•
Filing: 1968-01-23
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Granted: 1969-05-13
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Expires: 1988-01-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Rich
- 👤 Robert S Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:51
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0219; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1884; F28F2275/00; F28F2275/20
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) | 1972-05-12 | 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 |