Patent US3270906A successfully refreshed from Google Patents.
US3270906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for pressure vessels
Assignee: Chemical Construction Corp
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Filing: 1963-09-25
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Granted: 1966-09-06
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Expires: 1983-09-25
Abstract
No abstract record available.
Inventors
- 👤 Christensen Axel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:19
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02; F16B; F16B2200/00; F16B2200/10; F16B2200/50; F16B2200/506; Y; Y10; Y10T; Y10T292/00; Y10T292/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PRESSURE VESSEL WITH IMPROVED CLOSURE ASSEMBLY COMPRISING A VESSEL BODY, A COVER EXTENDING OVER AN OPENING IN SAID BODY, A PLURALITY OF EXTERNAL CLOSURE BOLTS HAVING TERMINAL NUTS AND EXTENDING BETWEEN SAID BODY AND SAID COVER, A PLURALITY OF LEVERS, EACH OF SAID CLOSURE BOLTS BEING ATTACHED TO ONE OF SAID LEVERS, SAID LEVERS PIVOTING ON SAID COVER AND EXTENDING BETWEEN SAID CLOSURE BOLTS AND A PLURALITY OF TENSION BOLTS ATTACHED TO SAID COVER, EACH OF SAID TENSION BOLTS BEING ATTACHED TO ONE
Claim 2
Dependent Claim
84 words
A PRESSURE VESSEL WITH IMPROVED CLOSURE ASSEMBLY COMPRISING A VESSEL BODY, A COVER EXTENDING OVER AN OPENING IN SAID BODY, A PLURALITY OF EXTERNAL CLOSURE BOLTS HAVING TERMINAL NUTS AND EXTENDING BETWEEN SAID BODY AND SAID COVER, A PLURALITY OF LEVERS, EACH OF SAID CLOSURE BOLTS BEING ATTACHED TO ONE OF SAID LEVERS, SAID LEVERS PIVOTING ON SAID COVER AND EXTENDING BETWEEN SAID CLOSURE BOLTS AND A PLURALITY OF TENSION BOLTS ATTACHED TO SAID COVER, EACH OF SAID TENSION BOLTS BEING ATTACHED TO ONE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |