US2905512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated piston ring
Assignee: Ramsey Corp
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Filing: 1958-04-24
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Granted: 1959-09-22
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Expires: 1978-04-24
Abstract
No abstract record available.
Inventors
- 👤 Roy D Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:00
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/26; C; C23; C23C; C23C4/00; C23C4/01; C23C4/04; C23C4/06; C23C4/08; C23C4/12; Y; Y10; Y10S; Y10S29/00; Y10S29/039; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/937; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49281; Y10T29/49826; Y10T29/49888; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12479; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PISTON RING HAVING SUBSTANTIALLY INCREASED RESISTANCE TO ABRASIVE WEAR, AND PROVIDED UPON AT LEAST ONE SURFACE THEREOF WITH A RELATIVELY THIN COATING OF MOLYBDENUM METAL INTIMATELY BONDED TO SAID SURFACE BY AN ALLOY OF THE MOLYBDENUM METAL AND THE RING METAL.
Claim 2
Dependent Claim
42 words
A PISTON RING HAVING SUBSTANTIALLY INCREASED RESISTANCE TO ABRASIVE WEAR, AND PROVIDED UPON AT LEAST ONE SURFACE THEREOF WITH A RELATIVELY THIN COATING OF MOLYBDENUM METAL INTIMATELY BONDED TO SAID SURFACE BY AN ALLOY OF THE MOLYBDENUM METAL AND THE RING METAL.
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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |