US3448665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding seal arrangements
Assignee: Individual
•
Filing: 1966-12-19
•
Granted: 1969-06-10
•
Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Fernand Stanislas Allinquant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:48
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/14; E21D15/44; F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3232; F16J15/3236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2420929A
Cited
US2521692A
Cited
US2684119A
Cited
US2815995A
Cited
US2815970A
Cited
US2913269A
Cited
US2977138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |