US2538422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid seal
Assignee: Individual
•
Filing: 1945-02-21
•
Granted: 1951-01-16
•
Expires: 1965-02-21
Abstract
No abstract record available.
Inventors
- 👤 Kollsman Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:05
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/441
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1334393A
Cited
US1689874A
Cited
US1825251A
Cited
US1779076A
Cited
DE524515C
Cited
US1999094A
Cited
US2048633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |