Patent US515410A successfully refreshed from Google Patents.
Patent US3371849A successfully refreshed from Google Patents.
US3371849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved bag of plastic material sheeting
Assignee: Windmoeller and Hoelscher KG
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Filing: 1965-08-19
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Granted: 1968-03-05
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Expires: 1985-08-19
Abstract
No abstract record available.
Inventors
- 👤 Rochla Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:34
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/14; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/84; B31B70/85; Y; Y10; Y10S; Y10S383/00; Y10S383/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A VALVED BAG COMPRISING A TUBE OF PLASTIC MATERIAL, SAID BAG TUBE HAVING AT LEAST ONE LONGITUDINAL TUBE FORMING HEAT SEAL SEAM, A TUBE CLOSING HEAT SEAL SEAM AT EACH OF THE TWO ENDS THEREOF, AND FURTHER COMPRISING AN INTERNAL VALVE SLEEVE OF PLASTICS MATERIAL BEING SECURED TO SAID BAG TUBE BY MEANS OF SAID TUBE FORMING SEAM, SAID VALVE SLEEVE HAVING TWO WALLS WHICH ARE WELDED TOGETHER BY A HEAT-SEALED FLAT SEAM AT LEAST ION THE REGION OF SAID TUBE FORMING SEAM, SAID TWO WALLS OF SAID VALVE ARE CONNECTED BY A FOLD AND SAID FLAT SEAM EXTENDS ALONG THE FOLD CONNECTING SAID TWO WALLS.
Claim 2
Dependent Claim
106 words
A VALVED BAG COMPRISING A TUBE OF PLASTIC MATERIAL, SAID BAG TUBE HAVING AT LEAST ONE LONGITUDINAL TUBE FORMING HEAT SEAL SEAM, A TUBE CLOSING HEAT SEAL SEAM AT EACH OF THE TWO ENDS THEREOF, AND FURTHER COMPRISING AN INTERNAL VALVE SLEEVE OF PLASTICS MATERIAL BEING SECURED TO SAID BAG TUBE BY MEANS OF SAID TUBE FORMING SEAM, SAID VALVE SLEEVE HAVING TWO WALLS WHICH ARE WELDED TOGETHER BY A HEAT-SEALED FLAT SEAM AT LEAST ION THE REGION OF SAID TUBE FORMING SEAM, SAID TWO WALLS OF SAID VALVE ARE CONNECTED BY A FOLD AND SAID FLAT SEAM EXTENDS ALONG THE FOLD CONNECTING SAID TWO WALLS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |