US3236438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic valved bags
Assignee: Monsanto Co
•
Filing: 1963-02-19
•
Granted: 1966-02-22
•
Expires: 1983-02-19
Abstract
No abstract record available.
Inventors
- 👤 Chester D Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:13
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A VALVE BAG COMPRISING, IN COMBINATION, A TUBULAR BODY OF THERMOPLASTIC FILM THAT IS HEAT SEALED ACROSS ITS TOP, A TOP CORNER OF SAID TUBULAR BODY BEING FOLDED INTO THE BAG AND CONSTITUTING A VALVE FLAP AND A PLURALITY OF VALVE SLEEVES OF THERMOPLASTIC FILM OF VARIOUS LENGTHS WHICH ARE THINNER GAUGE THAN THE THERMOPLASTIC FILM OF SAID TUBULAR BODY AND WHICH ARE HEAT SEALED AT ONE END TO THE VALVE FLAP AND AT A LENGTHWISE PORTION THEREOF PARTIALLY ACROSS THE TOP OF THE BAG, THE LONGEST SLEEVE BEING OF MINIMUM GAUGE AND SUBSTANTIALLY THINNER GAUGE THAN THE GAUGE OF SAID TUBULAR BODY SO AS TO BE MEMBRANE-LIKE IN EFFECT, THE THICKNESS OF THE TUBULAR BODY IN RELATION TO THE THICKNESS OF THE VARIOUS VALVE SLEEVES AND THE RELATIVE THICKNESS AND LENGTHS OF THE VARIOUS VALVE SLEEVES BEING SUCH TO EFFECT MULTIPLE PLUGGING THEREBY OBTAINING A TIGHT CLOSURE.
Claim 2
Dependent Claim
148 words
A VALVE BAG COMPRISING, IN COMBINATION, A TUBULAR BODY OF THERMOPLASTIC FILM THAT IS HEAT SEALED ACROSS ITS TOP, A TOP CORNER OF SAID TUBULAR BODY BEING FOLDED INTO THE BAG AND CONSTITUTING A VALVE FLAP AND A PLURALITY OF VALVE SLEEVES OF THERMOPLASTIC FILM OF VARIOUS LENGTHS WHICH ARE THINNER GAUGE THAN THE THERMOPLASTIC FILM OF SAID TUBULAR BODY AND WHICH ARE HEAT SEALED AT ONE END TO THE VALVE FLAP AND AT A LENGTHWISE PORTION THEREOF PARTIALLY ACROSS THE TOP OF THE BAG, THE LONGEST SLEEVE BEING OF MINIMUM GAUGE AND SUBSTANTIALLY THINNER GAUGE THAN THE GAUGE OF SAID TUBULAR BODY SO AS TO BE MEMBRANE-LIKE IN EFFECT, THE THICKNESS OF THE TUBULAR BODY IN RELATION TO THE THICKNESS OF THE VARIOUS VALVE SLEEVES AND THE RELATIVE THICKNESS AND LENGTHS OF THE VARIOUS VALVE SLEEVES BEING SUCH TO EFFECT MULTIPLE PLUGGING THEREBY OBTAINING A TIGHT CLOSURE.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |