US2601997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device
Assignee: VISCOSEAL CORP
•
Filing: 1949-07-09
•
Granted: 1952-07-01
•
Expires: 1969-07-09
Abstract
No abstract record available.
Inventors
- 👤 Douglas R Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR322403A
Cited
US1602177A
Cited
US1787459A
Cited
US1677262A
Cited
US2007414A
Cited
US2365046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |