US3035809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-lubricating compressible slide gate
Assignee: Phillips Petroleum Co
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Filing: 1960-03-18
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Granted: 1962-05-22
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Expires: 1980-03-18
Abstract
No abstract record available.
Inventors
- 👤 Travis R Dickinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/36; B; B65; B65D; B65D90/00; B65D90/54; B65D90/58; B65D90/587
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A SELF-LUBRICATING COMPRESSIBLE SLIDE GATE COMPRISING: A FIRST LAYER OF A SELF-LUBRICATING NORMALLY SOLID POLYMER OF ETHYLENE HAVING A DENSITY WITHIN THE RANGE OF 0.940 TO 0.980 GRAMS PER CC., AND A MOLECULAR WEIGHT WITHIN THE RANGE OF 35,000 TO 250,000; A SECOND LAYER OF SAID SOLID POLYMER; AND A LAYER OF RESILIENT MATERIAL DISPOSED BETWEEN AND SECURED TO EACH OF SAID LAYERS OF SAID SOLID POLYMER.
Claim 2
Dependent Claim
67 words
A SELF-LUBRICATING COMPRESSIBLE SLIDE GATE COMPRISING: A FIRST LAYER OF A SELF-LUBRICATING NORMALLY SOLID POLYMER OF ETHYLENE HAVING A DENSITY WITHIN THE RANGE OF 0.940 TO 0.980 GRAMS PER CC., AND A MOLECULAR WEIGHT WITHIN THE RANGE OF 35,000 TO 250,000; A SECOND LAYER OF SAID SOLID POLYMER; AND A LAYER OF RESILIENT MATERIAL DISPOSED BETWEEN AND SECURED TO EACH OF SAID LAYERS OF SAID SOLID POLYMER.
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) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |