Patent US3246973A successfully refreshed from Google Patents.
US3246973A
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Apparatus and method for healing glass lined pipe
Assignee: Pfaudler Inc
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Filing: 1961-07-14
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Granted: 1966-04-19
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Expires: 1981-07-14
Abstract
No abstract record available.
Inventors
- 👤 Glenn R Bange
- 👤 Maynard J Jones
- 👤 Herbert F Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:44
CPC Classifications
F; F16; F16L; F16L49/00; F16L58/00; F16L58/02; F16L58/04; F16L58/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49748; Y10T29/4975
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
APPARATUS FOR PREPARING GLASS LINED PIPE FOR JOINDER COMPRISING, IN COMBINATIONS, AN AXIALLY EXTENDING HEATING ELEMENT CONSTRUCTED TO BE RECEIVED IN SAID PIPE FOR APPLYING HEAT INTERNALLY OF SAID PIPE UNTIL SAID GLASS LINING BECOMES SOFT AND MEANS CONNECTED TO SAID PIPE FOR MAINTAINING SAID HEATING ELEMENT INTERNALLY OF SAID PIPE IN A SUBSTANTIALLY VERTICALLY DISPOSED POSITION.
Claim 2
Independent Claim
36 words
A METHOD FOR HEALING A GLASS LINED ARTICLE COMPRISING THE STEP OF: APPLYING HEAT INTERNALLY TO A SELECTED PORTION OF SAID ARTICLE TO BE HEALED UNTIL THE GLASS LINING OF SAID PORTION BECOMES SOFT AND HEALED.
References Cited (Backward Citations)
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US2189860A
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US2613480A
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US2385071A
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US2705627A
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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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |