US3304872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing means
Assignee: Individual
•
Filing: 1965-05-03
•
Granted: 1967-02-21
•
Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Charles L English
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:09
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/12; F04B53/00; F04B53/16; F04B53/162; F04B53/164; F16; F16K; F16K15/00; F16K15/14; F16K15/141; F16K15/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN AN IMPROVED SEALING DEVICE, THE COMBINATION OF: A FIRST MEMBER HAVING A BORE EXTENDING THERE-THROUGH AND A COUNTERBORE FORMED IN ONE END THEREOF WITH THE COUNTERBORE BEING A LARGER DIAMETER THAN SAID BORE; A CYLINDRICAL MEMBER SLIDINGLY DISPOSED IN SAID BORE FORMING AN ANNULUS WITH SAID FIRST MEMBER AND HAVING AN ANNULAR GROOVE ENCIRCLING SAID CYLINDRICAL MEMBER ADJACENT SAID FIRST MEMBER, AND A PASSAGEWAY EXTENDING FROM SAID GROOVE THROUGH A PORTION OF SAID CYLINDRICAL MEMBER INTO COMMUNICATION WITH SAID COUNTERBORE, SAID PASSAGEWAY HAVING A CROSS-SECTIONAL AREA GREATER THAN THE CROSS-SECTIONAL AREA OF SAID ANNULUS; AND,
Claim 2
Dependent Claim
96 words
IN AN IMPROVED SEALING DEVICE, THE COMBINATION OF: A FIRST MEMBER HAVING A BORE EXTENDING THERE-THROUGH AND A COUNTERBORE FORMED IN ONE END THEREOF WITH THE COUNTERBORE BEING A LARGER DIAMETER THAN SAID BORE; A CYLINDRICAL MEMBER SLIDINGLY DISPOSED IN SAID BORE FORMING AN ANNULUS WITH SAID FIRST MEMBER AND HAVING AN ANNULAR GROOVE ENCIRCLING SAID CYLINDRICAL MEMBER ADJACENT SAID FIRST MEMBER, AND A PASSAGEWAY EXTENDING FROM SAID GROOVE THROUGH A PORTION OF SAID CYLINDRICAL MEMBER INTO COMMUNICATION WITH SAID COUNTERBORE, SAID PASSAGEWAY HAVING A CROSS-SECTIONAL AREA GREATER THAN THE CROSS-SECTIONAL AREA OF SAID ANNULUS; AND,
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |