Patent US3245708A successfully refreshed from Google Patents.
US3245708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure vessel closure flange connection
Assignee: Babcock and Wilcox Co
•
Filing: 1964-12-31
•
Granted: 1966-04-12
•
Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Lambert F Kooistra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:33
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/02; F16J; F16J13/00; F16J13/02; F16B; F16B2200/00; F16B2200/50; F16B2200/506; Y; Y10; Y10S; Y10S411/00; Y10S411/904; Y10T; Y10T292/00; Y10T292/20; Y10T292/218
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
IN A BOLTED DEVICE SUBJECT TO HIGH TEMPERATURE OPERATION CAUSING THE FORMATION OF AN OXIDE FILM ON MATING THREAD SURFACES, SAID BOLTED DEVICE COMPRISING MEANS FORMING AN INTERNALLY THREADED HOLE HAVING A CLOSED END AND AN EXTERNALLY THREADED ELEMENT ARRANGED TO BE THREADEDLY CONNECTED IN SAID HOLE, A FILLER ELEMENT POSITIONED BETWEEN SAID CLOSED END OF SAID HOLE AND SAID THREADED ELEMENT, SAID FILLER ELEMENT FORMED OF A MATERIAL SUBJECT TO PLASTIC DEFORMATION DURING HIGH TEMPERATURE OPERATION OF SAID BOLTED DEVICE TO RELIEVE THE COMPRESSIVE FORCES ON SAID OXIDE FILM AND PREVENT SEIZURE OF SAID THREADED ELEMENT IN SAID HOLE.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |