US3220433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole structure
Assignee: Individual
•
Filing: 1962-08-31
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Granted: 1965-11-30
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Expires: 1982-08-31
Abstract
No abstract record available.
Inventors
- 👤 Irvin W Steil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:06
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02; Y; Y10; Y10T; Y10T137/00; Y10T137/5327; Y10T137/5497; Y10T137/6851; Y10T137/6966; Y10T137/6991; Y10T137/7069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
IN COMBINATION WITH THE VERTICALLY EXTENDING UPPER PORTION OF AN UNDERGROUND PIPE COMMUNICATING AT ITS LOWER END WITH AN UNDERGROUND TANK, MANHOLE STRUCTURE COMPRISING: (A) A HOLLOW CYLINDRICAL BODY MEMBER OF LARGER DIAMETER THAN SAID PIPE ADAPTED TO BE BURIED IN THE GROUND WITH ITS AXIS DISPOSED VERTICALLY AND WITH ITS UPPER END SUBSTANTIALLY FLUSH WITH THE GROUND SURFACE, SAID BODY MEMBER CONCENTRICALLY ENCLOSING THE UPPER END PORTION OF SAID PIPE AND BEING OPEN AT ITS UPPER AND LOWER ENDS, (B) A MANHOLE COVER ADAPTED TO CLOSE THE UPPER END OF SAID BODY MEMBER, AND (C) A SHEET METAL CONDENSER MEMBER OF GENERALLY FRUSTOCONICAL FORM DISPOSED IN SAID BODY MEMBER COAXIALLY THEREWITH, THE UPPER END OF SAID CONDENSER MEMBER BEING FITTED SNUGLY AROUND ITS ENTIRE PERIPHERY IN THE UPPER PORTION OF SAID BODY MEMBER, AND THE LOWER END OF SAID CONDENSER MEMBER BEING OF REDUCED DIAMETER AND HAVING A CIRCULAR APERTURE ADMITTING SAID PIPE, SAID APERTURE BEING OF SUCH DIAMETER AS TO PROVIDE A RESTRICTED NARROW ANNULAR SPACE BETWEEN SAID CONDENSER MEMBER AND SAID PIPE AT SAID APERTURE.
Claim 2
Dependent Claim
178 words
IN COMBINATION WITH THE VERTICALLY EXTENDING UPPER PORTION OF AN UNDERGROUND PIPE COMMUNICATING AT ITS LOWER END WITH AN UNDERGROUND TANK, MANHOLE STRUCTURE COMPRISING: (A) A HOLLOW CYLINDRICAL BODY MEMBER OF LARGER DIAMETER THAN SAID PIPE ADAPTED TO BE BURIED IN THE GROUND WITH ITS AXIS DISPOSED VERTICALLY AND WITH ITS UPPER END SUBSTANTIALLY FLUSH WITH THE GROUND SURFACE, SAID BODY MEMBER CONCENTRICALLY ENCLOSING THE UPPER END PORTION OF SAID PIPE AND BEING OPEN AT ITS UPPER AND LOWER ENDS, (B) A MANHOLE COVER ADAPTED TO CLOSE THE UPPER END OF SAID BODY MEMBER, AND (C) A SHEET METAL CONDENSER MEMBER OF GENERALLY FRUSTOCONICAL FORM DISPOSED IN SAID BODY MEMBER COAXIALLY THEREWITH, THE UPPER END OF SAID CONDENSER MEMBER BEING FITTED SNUGLY AROUND ITS ENTIRE PERIPHERY IN THE UPPER PORTION OF SAID BODY MEMBER, AND THE LOWER END OF SAID CONDENSER MEMBER BEING OF REDUCED DIAMETER AND HAVING A CIRCULAR APERTURE ADMITTING SAID PIPE, SAID APERTURE BEING OF SUCH DIAMETER AS TO PROVIDE A RESTRICTED NARROW ANNULAR SPACE BETWEEN SAID CONDENSER MEMBER AND SAID PIPE AT SAID APERTURE.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |