US3527440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blanking plate for gas flow passages
Assignee: Tower Iron Works Inc
•
Filing: 1968-06-17
•
Granted: 1970-09-08
•
Expires: 1988-06-17
Abstract
No abstract record available.
Inventors
- 👤 Siegfried Presslauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:39
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/04; F16K27/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1475731A
Cited
US1970964A
Cited
DE630742C
Cited
US2786644A
Cited
US3170668A
Cited
US3272475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |