US3218943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole cover support
Assignee: Individual
•
Filing: 1963-09-19
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Granted: 1965-11-23
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Harold M Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:28
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; E02D29/1409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A SECTIONAL MANHOLE COVER SUPPORT FOR VERTICALLY ADJUSTING THE LEVEL OF A MANHOLE COVER IN THE OPENING OF A MANHOLE HOUSING, EACH SECTION OF SAID SUPPORT COMPRISING A BASE MEMBER ADAPTED TO BE FIXED WITHIN SAID OPENING AGAINST VERTICAL MOVEMENT DOWNWARDLY IN USE THEREOF AND VERTICALLY ADJUSTABLE ELEVATING MEMBER FOR SUPPORTING A MANHOLE COVER; EACH SAID MEMBERS HAVING MEANS DEFINING LATERALLY DIRECTED SUPPORT SURFACES WHICH COMPLEMENTARILY INTERFIT EACH OTHER IN DIFFERENT RELATIVE POSITIONS FOR ADJUSTMENT OF SAID ADJUSTABLE ELEVATING MEMBER IN VERTICAL DIRECTION IN SAID OPENING; SAID MEMBERS EACH COMPRISING A PLURALITY OF ARCUATE SECTIONS COLLECTIVELY SUBSTANTIALLY FORMING A RING; AND MEANS FOR MOVING THE SECTIONS OF SAID BASE MEMBER CIRCUMFERENTIALLY APART TO EXPAND SAID BASE MEMBER WITHIN SAID OPENING OF SAID MANHOLE HOUSING TO TIGHTLY ENGAGE SAID HOUSING.
Claim 2
Dependent Claim
129 words
A SECTIONAL MANHOLE COVER SUPPORT FOR VERTICALLY ADJUSTING THE LEVEL OF A MANHOLE COVER IN THE OPENING OF A MANHOLE HOUSING, EACH SECTION OF SAID SUPPORT COMPRISING A BASE MEMBER ADAPTED TO BE FIXED WITHIN SAID OPENING AGAINST VERTICAL MOVEMENT DOWNWARDLY IN USE THEREOF AND VERTICALLY ADJUSTABLE ELEVATING MEMBER FOR SUPPORTING A MANHOLE COVER; EACH SAID MEMBERS HAVING MEANS DEFINING LATERALLY DIRECTED SUPPORT SURFACES WHICH COMPLEMENTARILY INTERFIT EACH OTHER IN DIFFERENT RELATIVE POSITIONS FOR ADJUSTMENT OF SAID ADJUSTABLE ELEVATING MEMBER IN VERTICAL DIRECTION IN SAID OPENING; SAID MEMBERS EACH COMPRISING A PLURALITY OF ARCUATE SECTIONS COLLECTIVELY SUBSTANTIALLY FORMING A RING; AND MEANS FOR MOVING THE SECTIONS OF SAID BASE MEMBER CIRCUMFERENTIALLY APART TO EXPAND SAID BASE MEMBER WITHIN SAID OPENING OF SAID MANHOLE HOUSING TO TIGHTLY ENGAGE SAID HOUSING.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |