US3311033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose fiber cans
Assignee: West Virginia Pulp and Paper Co
•
Filing: 1965-09-30
•
Granted: 1967-03-28
•
Expires: 1985-09-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph B Felton
- 👤 John F Turner
- 👤 Jr Archie D Duncan
- 👤 William J Funderburk
- 👤 Bart Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:44
CPC Classifications
B; B65; B65D; B65D15/00; B65D15/02; B65D15/04; B65D15/06; B65D15/08; B65D3/00; B65D3/02; B65D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD OF PRODUCING CANS SUITABLE FOR PACKAGING OF THERMAL PROCESSED FOODS WHICH COMPRISES IMPREGNATING A NON-WOVEN CELLULOSE FIBER WEB WITH A THERMOSETTING RESIN, CURING UNDER PRESSURE THE RESIN IN AT LEAST ONE SUCH RESIN IMPREGNATED WEB WHILE IN A FLAT STATE TO PRODUCE A UNIFIED SHEET HAVING FROM 15 TO 60% THERMOSET RESIN DISPERSED THROUGHOUT SAID SHEET, SAID SHEET HAVING A SPECIFIC GRAVITY OF AT LEAST 1.05 AND WHICH AFTER CONDITIONING IN A SATURATED STEAM ATMOSPHERE AT 212*F. FOR FIVE MINUTES WILL HAVE A MODULUS OF ELASTICITY IN FLEXURE OF AT LEAST 500,000 WHICH IS IN EXCESS OF 65% OF THE ORIGINAL MODULUS OF ELASTICITY IN FLEXURE PRIOR TO SUCH CONDITIONING, FORMING SAID CURED RESIN IMPREGNATED SHEET INTO A CYLINDRICAL SHAPE ADHESIVELY SECURING OPPOSITE EDGES OF THE SHEET TOGETHER TO FORM A CYLINDRICAL CAN BODY, AND ATTACHING A CAN END TO SAID CAN BODY.
Claim 2
Independent Claim
145 words
THE METHOD OF PRODUCING CANS SUITABLE FOR PACKAGING OF THERMAL PROCESSED FOODS WHICH COMPRISES IMPREGNATING A NON-WOVEN CELLULOSE FIBER WEB WITH A THERMOSETTING RESIN, CURING UNDER PRESSURE THE RESIN IN AT LEAST ONE SUCH RESIN IMPREGNATED WEB WHILE IN A FLAT STATE TO PRODUCE A UNIFIED SHEET HAVING FROM 15 TO 60% THERMOSET RESIN DISPERSED THROUGHOUT SAID SHEET, SAID SHEET HAVING A SPECIFIC GRAVITY OF AT LEAST 1.05 AND WHICH AFTER CONDITIONING IN A SATURATED STEAM ATMOSPHERE AT 212*F. FOR FIVE MINUTES WILL HAVE A MODULUS OF ELASTICITY IN FLEXURE OF AT LEAST 500,000 WHICH IS IN EXCESS OF 65% OF THE ORIGINAL MODULUS OF ELASTICITY IN FLEXURE PRIOR TO SUCH CONDITIONING, FORMING SAID CURED RESIN IMPREGNATED SHEET INTO A CYLINDRICAL SHAPE ADHESIVELY SECURING OPPOSITE EDGES OF THE SHEET TOGETHER TO FORM A CYLINDRICAL CAN BODY, AND ATTACHING A CAN END TO SAID CAN BODY.
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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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |