Patent US5166524A successfully refreshed from Google Patents.
US3217501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming tubes from strip material
Assignee: National Research Development Corp UK
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Filing: 1960-12-28
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Granted: 1965-11-16
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Expires: 1980-12-28
Abstract
No abstract record available.
Inventors
- 👤 Boa Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:40
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/56; B29C65/58; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0826; B21C37/10; B21C37/101; B29C53/00; B29C53/36; B29C53/38; B29C53/48; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/139; B29C66/20; B29C66/22; B29C66/227; B29C66/2272; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29L; B29L2023/00; B29L2023/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
PLOW APPARATUS FOR FORMING AN ELONGATED TRENCH AND SIMULTANEOUSLY DEPOSITING A CONTINUOUS LENGTH OF AN ELONGATED FLEXIBLE MEMBER, COMPRISING: A HOLLOW PLOW TINE DEFINING FOOT MEANS FOR FORMING A TRENCH BY FORCING FORWARDLY THROUGH THE GROUND, AN ELONGTED REARWARDLY EXTENDING GUIDE MEANS WITHIN AND PIVOTED TO THE TINE FOR RELATIVE PIVOTAL MOVEMENT THEREWITH SO AS TO REMAIN IN CONTACT WITH THE TRENCH BOTTOM OVER LIMITED CHANGES ON ANGULAR ATTITUDE OF THE PLOW TINE, SAID GUIDE MEANS HAVING A FORWARD END PORTION, MEANS IN THE TINE ENABLING FEEDING OF A CONTINUOUS LENGTH OF FLEXIBLE MATERIAL DOWN THE INTERIOR OF THE TINE TO THE FOOT MEANS AND REARWARDLY
Claim 2
Dependent Claim
106 words
PLOW APPARATUS FOR FORMING AN ELONGATED TRENCH AND SIMULTANEOUSLY DEPOSITING A CONTINUOUS LENGTH OF AN ELONGATED FLEXIBLE MEMBER, COMPRISING: A HOLLOW PLOW TINE DEFINING FOOT MEANS FOR FORMING A TRENCH BY FORCING FORWARDLY THROUGH THE GROUND, AN ELONGTED REARWARDLY EXTENDING GUIDE MEANS WITHIN AND PIVOTED TO THE TINE FOR RELATIVE PIVOTAL MOVEMENT THEREWITH SO AS TO REMAIN IN CONTACT WITH THE TRENCH BOTTOM OVER LIMITED CHANGES ON ANGULAR ATTITUDE OF THE PLOW TINE, SAID GUIDE MEANS HAVING A FORWARD END PORTION, MEANS IN THE TINE ENABLING FEEDING OF A CONTINUOUS LENGTH OF FLEXIBLE MATERIAL DOWN THE INTERIOR OF THE TINE TO THE FOOT MEANS AND REARWARDLY
References Cited (Backward Citations)
NL93022C
Cited
US628039A
Cited
GB283035A
Cited
US1904666A
Cited
US2330207A
Cited
US2754784A
Cited
US2912075A
Cited
US2762117A
Cited
US2911932A
Cited
US2855252A
Cited
US3120107A
Cited
US3059437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |