US2749265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making pleated paper filter elements
Assignee: Bendix Aviation Corp
•
Filing: 1953-11-05
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Granted: 1956-06-05
•
Expires: 1973-11-05
Abstract
No abstract record available.
Inventors
- 👤 Guy C Fricke
- 👤 Charles P Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:36
CPC Classifications
F; F16; F16N; F16N39/00; F16N39/06; B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B31; B31D; B31D5/00; B31D5/0082; B01D2201/00; B01D2201/04; B01D2201/0407; Y; Y10; Y10S; Y10S55/00; Y10S55/05; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025; Y10T156/1036; Y10T156/1038
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD OF MAKING PLEATED PAPER FILTER ELEMENTS HAVING ENDCAPS, A CYLINDRICAL CORE, AND A PERFORATED PAPER OUTER WRAPPER, COMPRISING FORMING A FLAT SHEET OF RESINOUS IMPREGNATED FILTER MATERIAL INTO UNIFORM PLEATS, BONDING SAID PLEATED MATERIAL TO A FLAT RECTANGULAR PERFORATED PIECE OF CORE MATERIAL, THE PLEATS BEING THUS SECURED IN A UNIFORM SPACING RELATIONSHIP, FORMING A CYLINDRICAL CORE BY BENDING THE ENDS OF SAID CORE MATERIAL TOGETHER AND SECURING SAID ENDS WITH A LAP STRIP THUS CAUSING SAID PLEATED MATERIAL TO ASSUME A CYLINDRICAL SHAPE, BONDING THE END FOLDS OF SAID PLEATED MATERIAL TOGETHER, BONDING ENDCAPS TO EACH END OF SAID PLEATED MATERIAL, AND SECURING SAID PERFORATED OUTER WRAPPER TO THE OUTSIDE PLEATS OF SAID PLEATED MEMBER.
Claim 2
Independent Claim
118 words
A METHOD OF MAKING PLEATED PAPER FILTER ELEMENTS HAVING ENDCAPS, A CYLINDRICAL CORE, AND A PERFORATED PAPER OUTER WRAPPER, COMPRISING FORMING A FLAT SHEET OF RESINOUS IMPREGNATED FILTER MATERIAL INTO UNIFORM PLEATS, BONDING SAID PLEATED MATERIAL TO A FLAT RECTANGULAR PERFORATED PIECE OF CORE MATERIAL, THE PLEATS BEING THUS SECURED IN A UNIFORM SPACING RELATIONSHIP, FORMING A CYLINDRICAL CORE BY BENDING THE ENDS OF SAID CORE MATERIAL TOGETHER AND SECURING SAID ENDS WITH A LAP STRIP THUS CAUSING SAID PLEATED MATERIAL TO ASSUME A CYLINDRICAL SHAPE, BONDING THE END FOLDS OF SAID PLEATED MATERIAL TOGETHER, BONDING ENDCAPS TO EACH END OF SAID PLEATED MATERIAL, AND SECURING SAID PERFORATED OUTER WRAPPER TO THE OUTSIDE PLEATS OF SAID PLEATED MEMBER.
References Cited (Backward Citations)
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US2457958A
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US2556521A
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US2627350A
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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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |