US3308727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for manhole cover and the like
Assignee: CENTRAL STATES IND SUPPLY COMP
•
Filing: 1964-04-08
•
Granted: 1967-03-14
•
Expires: 1984-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr William A Hurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:10
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; E02D29/149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A CUSHIONING DEVICE FOR USE IN SUPPORTING A COVER, SUCH AS A MANHOLE COVER, ON A SUPPORT MEMBER, SAID DEVICE COMPRISING AN ELONGATED, RESILIENT GASKET MEMBER, SAID GASKET MEMBER BEING OF A HOLLOW, SUBSTANTIALLY SYMMETRICAL SHAPE IN TRANSVERSE CROSS-SECTION INCLUDING SPACED, OUTWARDLY ARCHED TOP AND BOTTOM WALLS, A PAIR OF SPACED, SIDE WALLS INTEGRALLY UNITING AND DEFINING FLEXURE REGIONS BETWEEN SAID TOP AND BOTTOM WALL, SAID SIDE WALLS EACH HAVING CONVERGING PLANAR PORTIONS WHICH EXTEND TOWARD ONE ANOTHER IN A DIRECTION AWAY FROM THEIR RESPECTIVE JUNCTURES WITH THE TOP AND BOTTOM WALLS TO A LINE OF UNION BETWEEN SAID TOP AND BOTTOM WALLS, SAID PLANAR PORTIONS BEING OF A SUBSTANTIALLY GREATER THICKNESS AT THEIR JUNCTURES WITH THE RESPECTIVE TOP AND BOTTOM WALLS AS
Claim 2
Dependent Claim
123 words
A CUSHIONING DEVICE FOR USE IN SUPPORTING A COVER, SUCH AS A MANHOLE COVER, ON A SUPPORT MEMBER, SAID DEVICE COMPRISING AN ELONGATED, RESILIENT GASKET MEMBER, SAID GASKET MEMBER BEING OF A HOLLOW, SUBSTANTIALLY SYMMETRICAL SHAPE IN TRANSVERSE CROSS-SECTION INCLUDING SPACED, OUTWARDLY ARCHED TOP AND BOTTOM WALLS, A PAIR OF SPACED, SIDE WALLS INTEGRALLY UNITING AND DEFINING FLEXURE REGIONS BETWEEN SAID TOP AND BOTTOM WALL, SAID SIDE WALLS EACH HAVING CONVERGING PLANAR PORTIONS WHICH EXTEND TOWARD ONE ANOTHER IN A DIRECTION AWAY FROM THEIR RESPECTIVE JUNCTURES WITH THE TOP AND BOTTOM WALLS TO A LINE OF UNION BETWEEN SAID TOP AND BOTTOM WALLS, SAID PLANAR PORTIONS BEING OF A SUBSTANTIALLY GREATER THICKNESS AT THEIR JUNCTURES WITH THE RESPECTIVE TOP AND BOTTOM WALLS AS
References Cited (Backward Citations)
US2736076A
Cited
US1389557A
Cited
US1940924A
Cited
GB443634A
Cited
US2503882A
Cited
US2942308A
Cited
US2959832A
Cited
US3075258A
Cited
US3117352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |