US2979457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulfide lubricant and sealant composition
Assignee: Rockwell Manufacturing Co
•
Filing: 1957-02-01
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Granted: 1961-04-11
•
Expires: 1977-02-01
Abstract
No abstract record available.
Inventors
- 👤 George F Scherer
- 👤 Otto T Bierwagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:14
CPC Classifications
C; C10; C10M; C10M7/00; C10M2201/00; C10M2201/10; C10M2201/102; C10M2201/105; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2211/00; C10M2211/02; C10M2211/024; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2221/00; C10M2221/02; C10N; C10N2050/00; C10N2050/08; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A LUBRICATING AND SEALING COMPOSITION COMPRISING AS ITS ESSENTIAL INGREDIENTS A MAJOR PORTION OF A SYNTHETIC LIQUID ORGANIC POLYSULFIDE POLYMER, AND SUBSTANTIALLY FROM TWO TO SEVEN PARTS BY WEIGHT OF MICROSILICA, AND SUBSTANTIALLY FROM 0.1 TO 1.5 PARTS BY WEIGHT OF POLYTETRAFLUOROETHYLENE TO THICKEN SAID LIQUID POLYMER TO A CONSISTENCY THAT THE COMPOSITION WILL BE SUITABLE FOR USE AS A PLUG VALVE LUBRICANT AND SEALANT.
Claim 2
Dependent Claim
65 words
A LUBRICATING AND SEALING COMPOSITION COMPRISING AS ITS ESSENTIAL INGREDIENTS A MAJOR PORTION OF A SYNTHETIC LIQUID ORGANIC POLYSULFIDE POLYMER, AND SUBSTANTIALLY FROM TWO TO SEVEN PARTS BY WEIGHT OF MICROSILICA, AND SUBSTANTIALLY FROM 0.1 TO 1.5 PARTS BY WEIGHT OF POLYTETRAFLUOROETHYLENE TO THICKEN SAID LIQUID POLYMER TO A CONSISTENCY THAT THE COMPOSITION WILL BE SUITABLE FOR USE AS A PLUG VALVE LUBRICANT AND SEALANT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |