Patent US3083773A successfully refreshed from Google Patents.
US3083773A
Expired / Lapsed
US
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Paraffin scraper
Assignee: Houston Oil Field Material Co Inc
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Filing: 1961-08-04
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Granted: 1963-04-02
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Expires: 1981-08-04
Abstract
No abstract record available.
Inventors
- 👤 Richard R Nagel
- 👤 Nash O Campise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:59
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44744; Y10T24/44752; Y10T24/44769; Y10T24/44906; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885; Y10T29/49908; Y10T29/49915; Y10T29/49922
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A PARAFFIN SCRAPER FOR USE ON A SUCKER ROD COMPRISING, A UNITARY TUBULAR BODY OF RESILIENT SPRING STEEL, SAID BODY INCLUDING AN AXIALLY EXTENDING OPENING AND SIZED TO FIT AROUND AND SNAP ON AND HOLD THE BODY TO A SUCKER ROD, A BLADE PORTION EXTENDING OUTWARDLY FROM THE BODY AT ONE SIDE OF THE OPENING TO SCRAPE PARAFFIN FROM A WELL CASING, SAID BLADE ADAPTED TO BE POSITIONED ON THE LEADING EDGE OF THE OPENING WHEN THE ROD IS ROTATED THEREBY TIGHTENING THE SCRAPER ON THE ROD, AND A STOP LUG ON THE
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |