Patent US3220635A successfully refreshed from Google Patents.
US3220635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic bag
Assignee: Union Carbide Corp
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Filing: 1962-11-09
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Granted: 1965-11-30
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Expires: 1982-11-09
Abstract
No abstract record available.
Inventors
- 👤 Howard E Kasting
- 👤 John P Sachs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:44
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/14; B65D31/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A SATCHEL BOTTOM BAG OF HEAT-SEALABLE THERMO-PLASTIC FILM HAVING AT LEAST, AT ONE END, A RECTANGULAR CLOSURE STRUCTURE COMPRISING A PAIR OF OPPOSED INFOLDED END PORTIONS AND A SEPARATE THERMOPLASTIC FILM MEMBERS BRIDGING THE GAP BETWEEN AND OVERLAPPING AT LEAST THE ENDS OF SAID INFOLDED END PORTIONS SUCH THAT AT LEAST ONE END OF SAID MEMBRANE IS HEAT SEALED DIRECTLY TO THE END PORTION WHICH
Claim 2
Dependent Claim
65 words
A SATCHEL BOTTOM BAG OF HEAT-SEALABLE THERMO-PLASTIC FILM HAVING AT LEAST, AT ONE END, A RECTANGULAR CLOSURE STRUCTURE COMPRISING A PAIR OF OPPOSED INFOLDED END PORTIONS AND A SEPARATE THERMOPLASTIC FILM MEMBERS BRIDGING THE GAP BETWEEN AND OVERLAPPING AT LEAST THE ENDS OF SAID INFOLDED END PORTIONS SUCH THAT AT LEAST ONE END OF SAID MEMBRANE IS HEAT SEALED DIRECTLY TO THE END PORTION WHICH
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |