Patent US3258271A successfully refreshed from Google Patents.
US3258271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-tight joint
Assignee: Woodward Iron Co
•
Filing: 1963-07-29
•
Granted: 1966-06-28
•
Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Albert A Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/10; F16L27/00; F16L27/10; F16L27/1017; Y; Y10; Y10S; Y10S277/00; Y10S277/928; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3662; Y10T137/3677
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A FLUID-TIGHT PACKING DEVICE FOR INSERTION BETWEEN THE MATING SURFACAES OF THE HUB AND SPIGOT ENDS OF TWO ADJACENT PIPE SECTIONS, COMPRISING, IN COMBINATION, AN ANNULAR, HOLLOW RING OF INFLATABLE MATERIAL, A MASS OF MATERIAL FILLING SAID RING WHICH IS LIQUID WHEN INJECTED INTO THE RING, BUT SOLID UNDER NORMAL CONDITIONS OF USE OF SAID PACKING DEVICE, AN INTERNALLY CLOSABLE INLET VALVE IN THE OUTER END WALL OF SAID RING, COMMUNICATING WITH THE INTERIOR THEREOF, MEANS NORMALLY CLOSING SAID VALVE, A
Claim 2
Dependent Claim
81 words
A FLUID-TIGHT PACKING DEVICE FOR INSERTION BETWEEN THE MATING SURFACAES OF THE HUB AND SPIGOT ENDS OF TWO ADJACENT PIPE SECTIONS, COMPRISING, IN COMBINATION, AN ANNULAR, HOLLOW RING OF INFLATABLE MATERIAL, A MASS OF MATERIAL FILLING SAID RING WHICH IS LIQUID WHEN INJECTED INTO THE RING, BUT SOLID UNDER NORMAL CONDITIONS OF USE OF SAID PACKING DEVICE, AN INTERNALLY CLOSABLE INLET VALVE IN THE OUTER END WALL OF SAID RING, COMMUNICATING WITH THE INTERIOR THEREOF, MEANS NORMALLY CLOSING SAID VALVE, A
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |