US2850797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of assembling butyl rubber "o" rings in a hydraulic system
Assignee: Douglas Aircraft Co Inc
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Filing: 1956-03-02
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Granted: 1958-09-09
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Expires: 1976-03-02
Abstract
No abstract record available.
Inventors
- 👤 Carl W Chambers
- 👤 Douglas H Moreton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:12
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/324; C; C10; C10M; C10M7/00; C10M2201/00; C10M2201/06; C10M2201/065; C10M2201/066; C10M2201/14; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2050/00; C10N2050/08; C10N2050/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN THE METHOD OF ASSEMBLING THE PARTS OF A HYDRAULIC SYSTEM FOR USE WITH A PHOSPHATE ESTER BASE HYDRAULIC FLUID IN WHICH BUTYL RUBBER O RINGS ARE ASSEMBLED IN A PISTON UNIT AND A LUBRICANT IS APPLIED TO THE PARTS DURING ASSEMBLY, THE IMPROVEMENT FOR ASSEMBLING BUTYL RUBBER O RINGS IN SUCH A PISTON UNIT WHICH COMPRISES APPLYING TO SAID BUTYL RUBBER O RINGS A GREASE-LIKE COMPOSITION CONSISTING OF A PHOSPHATE ESTER COMPONENT COMPATIBLE WITH SAID BUTYL RUBBER, AN ORGANOPHILIC BETONITE FORMING A GEL WITH SAID PHOSPHATE ESTER COMPONENT, AND MOLYBDENUM DISULFIDE.
Claim 2
Dependent Claim
92 words
IN THE METHOD OF ASSEMBLING THE PARTS OF A HYDRAULIC SYSTEM FOR USE WITH A PHOSPHATE ESTER BASE HYDRAULIC FLUID IN WHICH BUTYL RUBBER O RINGS ARE ASSEMBLED IN A PISTON UNIT AND A LUBRICANT IS APPLIED TO THE PARTS DURING ASSEMBLY, THE IMPROVEMENT FOR ASSEMBLING BUTYL RUBBER O RINGS IN SUCH A PISTON UNIT WHICH COMPRISES APPLYING TO SAID BUTYL RUBBER O RINGS A GREASE-LIKE COMPOSITION CONSISTING OF A PHOSPHATE ESTER COMPONENT COMPATIBLE WITH SAID BUTYL RUBBER, AN ORGANOPHILIC BETONITE FORMING A GEL WITH SAID PHOSPHATE ESTER COMPONENT, AND MOLYBDENUM DISULFIDE.
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) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |