Patent US2984895A successfully refreshed from Google Patents.
US2984895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reconditioning worn pistons
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1958-10-08
•
Granted: 1961-05-23
•
Expires: 1978-10-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Clarence F Griffin
- 👤 Noel W Barnhill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:16
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/02; B; B23; B23P; B23P15/00; B23P15/10; B23P15/105; B23P6/00; B23P6/02; C; C09; C09D; C09D163/00; F05; F05C; F05C2253/00; F05C2253/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/4925; Y10T29/49256; Y10T29/49263; Y10T29/49718; Y10T29/49732; Y10T29/49734; Y10T29/49737; Y10T29/49746
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD FOR RECONDITIONING A WORN, GENERALLY CYLINDRICAL PISTON COMPRISING THE FOLLOWING STEPS: APPLYING TO THE CURVED, CYLINDRICAL SURFACE OF THE PISTON A SUBSTANCE COMPRISING UP TO 5% BY WEIGHT OF MOLYBDENUM DISULFIDE, APPROXIMATELY 50% BY WEIGHT OF PARTICLE MATERIAL HAVING SUBSTANTIALLY THE SAME TENSILE AND COMPRESSIONAL STRENGTHS AS THE MATERIAL OF THE PISTON, AND 45% BY WEIGHT OF A LOW MOLECULAR WEIGHT, NORMALLY LIQUID EPOXY RESIN AND A CATALYTIC HARDENING AGENT ADAPTED TO HARDEN THE RESIN AT TEMPERATURES NOT GREATER THAN 100* F., ALLOWING THE SUBSTANCE TO HARDEN, AND MACHINING THE HARDENED MIXTURE TO THE DESIRED DIAMETER.
Claim 2
Independent Claim
98 words
A METHOD FOR RECONDITIONING A WORN, GENERALLY CYLINDRICAL PISTON COMPRISING THE FOLLOWING STEPS: APPLYING TO THE CURVED, CYLINDRICAL SURFACE OF THE PISTON A SUBSTANCE COMPRISING UP TO 5% BY WEIGHT OF MOLYBDENUM DISULFIDE, APPROXIMATELY 50% BY WEIGHT OF PARTICLE MATERIAL HAVING SUBSTANTIALLY THE SAME TENSILE AND COMPRESSIONAL STRENGTHS AS THE MATERIAL OF THE PISTON, AND 45% BY WEIGHT OF A LOW MOLECULAR WEIGHT, NORMALLY LIQUID EPOXY RESIN AND A CATALYTIC HARDENING AGENT ADAPTED TO HARDEN THE RESIN AT TEMPERATURES NOT GREATER THAN 100* F., ALLOWING THE SUBSTANCE TO HARDEN, AND MACHINING THE HARDENED MIXTURE TO THE DESIRED DIAMETER.
References Cited (Backward Citations)
US2220210A
Cited
US2301513A
Cited
US2361211A
Cited
US2650418A
Cited
US2695425A
Cited
US2794523A
Cited
US2752668A
Cited
US2893793A
Cited
US2856679A
Cited
US2838829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |