US2809397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing self lubricating, asbestos containing stuffing box packings
Assignee: Individual
•
Filing: 1953-09-18
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Granted: 1957-10-15
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Expires: 1973-09-18
Abstract
No abstract record available.
Inventors
- 👤 Zagorski Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:40
CPC Classifications
C; C04; C04B; C04B30/00; C04B30/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
150 words
A METHOD OF PRODUCING A SELF-LUBRICATING PACKING, COMPRISING THE STEPS OF AGITATING BETWEEN 20 AND 60 PARTS OF FIBROUS ASBESTOS IN CONTACT WITH BETWEEN 5 AND 15 PARTS OF A FINELY DIVIDED SOLID ABRASIVE MATERIAL SO AS TO LOOSEN THE FIBERS OF SAID FIBROUS ASBESTOS AND INCREASE THE SURFACE CONTACT AREA THEREOF WHILE RETAINING ITS FIBROUS STRUCTURE; FORMING A MIXTURE OF THE THUS FIBERLOOSENED FIBROUS ASBESTOS, SAID FINELY DIVIDED SOLID ABRASIVE MATERIAL AND BETWEEN 30 AND 65 PARTS OF A DRY, FINELY DIVIDED SOLID MINERAL LUBRICATING MATERIAL, SAID FIBERLOOSENED FIBROUS ASBESTOS HOLDING SAID FINELY DIVIDED MINERAL LUBRICATING MATERIAL DUE TO THE LARGE CONTACT SURFACE AREA AND THE LOOSENING OF THE FIBERS OF SAID ASBESTOS BY SAID FINELY DIVIDED ABRASIVE MATERIAL; ADDING WATER GLASS TO SAID MIXTURE; AND MOLDING SAID WATER GLASS CONTAINING MIXTURE INTO SHAPED BODIES, WHEREBY A RESILIENT, SELFLUBRICATING PACKING, RESISTANT AGAINST TEMPERATURES UP TO 600* C. IS OBTAINED.
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) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |