US2637674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of impregnated laminated tubes
Assignee: Individual
•
Filing: 1946-08-31
•
Granted: 1953-05-05
•
Expires: 1966-08-31
Abstract
No abstract record available.
Inventors
- 👤 William F Stahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:38
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/12; B29C35/14; B29C53/00; B29C53/56; B29C53/58; B29C53/581; B29C2791/00; B29C2791/001; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A PROCESS FOR CONSTRUCTING A LAMINATED IMPREGNATED TUBE, THE STEPS OF PASSING A TUBE FORMED OF SPIRALLY-WRAPPED PAPER STRIPS WITH ADHESIVE THEREBETWEEN, THE STRIPS BEING IMPREGNATED WITH A RESIN WHICH IS THERMO-SETTING AT A HIGHER TEMPERATURE THAN THE CRYSTALLIZATION TEMPERATURE OF SAID ADHESIVE, THROUGH A PRESSURE DIE WHILE APPLYING HIGH FREQUENCY CURRENTS TO THE DIE, THE FREQUENCY AND MAGNITUDE OF THE CURRENTS BEING SUCH AS TO RAISE THE TEMPERATURE OF THE TUBE FIRST TO THE CRYSTALLIZING TEMPERATURE OF THE ADHESIVE AND THEN TO THE THERMOSETTING TEMPERATURE OF THE RESIN.
Claim 2
Dependent Claim
90 words
IN A PROCESS FOR CONSTRUCTING A LAMINATED IMPREGNATED TUBE, THE STEPS OF PASSING A TUBE FORMED OF SPIRALLY-WRAPPED PAPER STRIPS WITH ADHESIVE THEREBETWEEN, THE STRIPS BEING IMPREGNATED WITH A RESIN WHICH IS THERMO-SETTING AT A HIGHER TEMPERATURE THAN THE CRYSTALLIZATION TEMPERATURE OF SAID ADHESIVE, THROUGH A PRESSURE DIE WHILE APPLYING HIGH FREQUENCY CURRENTS TO THE DIE, THE FREQUENCY AND MAGNITUDE OF THE CURRENTS BEING SUCH AS TO RAISE THE TEMPERATURE OF THE TUBE FIRST TO THE CRYSTALLIZING TEMPERATURE OF THE ADHESIVE AND THEN TO THE THERMOSETTING TEMPERATURE OF THE RESIN.
References Cited (Backward Citations)
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GB527674A
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US2354556A
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US2393100A
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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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |