Patent US3152809A successfully refreshed from Google Patents.
US3152809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved molded cup
Assignee: Empire Rubber Co
•
Filing: 1961-04-24
•
Granted: 1964-10-13
•
Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 Tom C Waldrop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:44
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A SWAB CUP HAVING AN ANNULAR BODY OF RESILIENT MATERIAL TENDING TO SHRINK DUE TO HEAT TREATING AND HAVING AN ANNULAR SERIES OF CIRCUMFERENTIALLY SPACED METAL REINFORCEMENT ELEMENTS EACH DISPOSED LONGITUDINALLY OF THE CUP AND EMBEDDED THEREIN AND THE BOTTOM OF THE CUP TERMINATING IN AN ANNULAR BASE ZONE OF RESILIENT MATERIAL, SAID ELEMENTS EXTENDING DOWNWARDLY AND HAVING LOWER ENDS LOCATED IN SAID BASE ZONE OF THE BODY AT A LEVEL IMMEDIATELY ADJACENT TO THE BOTTOM OF THE CUP, MEANS FOR EQUALIZING THE SHRINKAGE OF SAID BASE-ZONE MATERIAL IN SECTORS DISPOSED BETWEEN SAID REINFORCEMENTS AS COMPARED WITH THE SHRINKAGE IN SECTORS INCLUDING ONE OF SAID ELEMENTS, COMPRISING METAL PLATE MEANS OCCUPYING THE SPACE BETWEEN THE LOWER ENDS OF THE REINFORCEMENT ELEMENTS AND HAVING SURFACES LYING IN A COMMON PLANE NORMAL TO THE AXIS OF THE CUP AND SUBSTANTIALLY AT THE SAME LEVEL AS SAID LOWER ENDS.
Claim 2
Dependent Claim
147 words
IN A SWAB CUP HAVING AN ANNULAR BODY OF RESILIENT MATERIAL TENDING TO SHRINK DUE TO HEAT TREATING AND HAVING AN ANNULAR SERIES OF CIRCUMFERENTIALLY SPACED METAL REINFORCEMENT ELEMENTS EACH DISPOSED LONGITUDINALLY OF THE CUP AND EMBEDDED THEREIN AND THE BOTTOM OF THE CUP TERMINATING IN AN ANNULAR BASE ZONE OF RESILIENT MATERIAL, SAID ELEMENTS EXTENDING DOWNWARDLY AND HAVING LOWER ENDS LOCATED IN SAID BASE ZONE OF THE BODY AT A LEVEL IMMEDIATELY ADJACENT TO THE BOTTOM OF THE CUP, MEANS FOR EQUALIZING THE SHRINKAGE OF SAID BASE-ZONE MATERIAL IN SECTORS DISPOSED BETWEEN SAID REINFORCEMENTS AS COMPARED WITH THE SHRINKAGE IN SECTORS INCLUDING ONE OF SAID ELEMENTS, COMPRISING METAL PLATE MEANS OCCUPYING THE SPACE BETWEEN THE LOWER ENDS OF THE REINFORCEMENT ELEMENTS AND HAVING SURFACES LYING IN A COMMON PLANE NORMAL TO THE AXIS OF THE CUP AND SUBSTANTIALLY AT THE SAME LEVEL AS SAID LOWER ENDS.
References Cited (Backward Citations)
US2352812A
Cited
US2609258A
Cited
US2466572A
Cited
US2711939A
Cited
US2723721A
Cited
US2887347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |