Patent US3123883A successfully refreshed from Google Patents.
US3123883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast-in-place pipe machine
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
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Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:23
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/14; B28B21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN AN APPARATUS FOR PRODUCING CEMENTITIOUS CONDUITS IN A TRENCH, AND COMPRISING: A VEHICLE ADAPTED TO BE MOVED ALONG SAID TRENCH, A PLURALITY OF ARCH FORMS CAPABLE OF BEING RELEASABLY SECURED TOGETHER, EACH OF SAID FORMS BEING RECEIVED ON SAID VEHICLE AND SECURED TO THE PRECEDING ARCH FORM, A BRACE MEANS CONNECTED TO EACH FORM AND BEING SELF-ACTUABLE UPON ENLARGEMENT OF THE ARCH FORM''S CONTOUR, AND GUIDE MEANS MOUNTED UPON SAID VEHICLE AND ENGAGEABLE WITH DEPENDING SIDE EDGES OF SAID ARCH FORM FOR PRODUCING AN ENLARGEMENT OF THE ARCH FORM''S CONTOUR TO ACTUATE SAID BRACE MEANS.
Claim 2
Dependent Claim
96 words
IN AN APPARATUS FOR PRODUCING CEMENTITIOUS CONDUITS IN A TRENCH, AND COMPRISING: A VEHICLE ADAPTED TO BE MOVED ALONG SAID TRENCH, A PLURALITY OF ARCH FORMS CAPABLE OF BEING RELEASABLY SECURED TOGETHER, EACH OF SAID FORMS BEING RECEIVED ON SAID VEHICLE AND SECURED TO THE PRECEDING ARCH FORM, A BRACE MEANS CONNECTED TO EACH FORM AND BEING SELF-ACTUABLE UPON ENLARGEMENT OF THE ARCH FORM''S CONTOUR, AND GUIDE MEANS MOUNTED UPON SAID VEHICLE AND ENGAGEABLE WITH DEPENDING SIDE EDGES OF SAID ARCH FORM FOR PRODUCING AN ENLARGEMENT OF THE ARCH FORM''S CONTOUR TO ACTUATE SAID BRACE MEANS.
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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) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |