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Patent US3414274A successfully refreshed from Google Patents.
US3414274A
Expired / Lapsed
US
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Controlled leakage, close clearance seal system
Assignee: Harrworth Inc
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Filing: 1965-06-01
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Granted: 1968-12-03
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Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Aronson David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:24
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F01; F01D; F01D11/00; F01D11/02; F01D11/04; Y; Y10; Y10S; Y10S277/00; Y10S277/918; Y10S277/93
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |