US3469853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing devices
Assignee: Dowty Rotol Ltd
•
Filing: 1966-12-28
•
Granted: 1969-09-30
•
Expires: 1986-12-28
Abstract
No abstract record available.
Inventors
- 👤 Denzil S Gullick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:59
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/56; F16J15/16; F16J15/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2567527A
Cited
US2711333A
Cited
GB710374A
Cited
US3071386A
Cited
US3144254A
Cited
US3146683A
Cited
US3381970A
Cited
US3261613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |