Patent US3204760A successfully refreshed from Google Patents.
US3204760A
Expired / Lapsed
US
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Assignee: Poly-Pak Corp of America
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Filing: 1962-10-10
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Granted: 1965-09-07
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Expires: 1982-10-10
Abstract
No abstract record available.
Inventors
- 👤 Carlton L Whiteford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:49
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/28; B65D75/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
AN ARTICLE OF MANUFACTURE COMPRISING A PAIR OF OVERLYING SHEETS OF SUSIBLE RESIN MATERIAL HAVING CORRESPONDING DIMENSIONS, SAID SHEETS BEING JOINED BY A FUSION SEAL ADJACENT A MAJOR PORTION OF THE MARGINAL EDGES OF SAID OVERLYING SHEETS DEFINING AN ENVELOPE HAVING A FILLER OPENING, A SEMI-SEAL SPACED INWARDLY FROM AND COEXTENSIVE WITH SAID FUSION SEAL FOR JOINING SAID SHEETS DEFINING A FIRST CHAMBER CENTRALLY OF SAID ENVELOPE AND A SECOND CHAMBER CONCENTRICALLY SURROUNDING SAID FIRST CHAMABER, SAID SEMI-SEAL BEING RELATIVELY EASILY OPENED FOR COMMUNICATING SAID CENTRAL CHAMBER AND SAID SURROUNDING CHAMBER.
References Cited (Backward Citations)
US2422725A
Cited
US2633284A
Cited
GB697723A
Cited
US2788821A
Cited
US2954116A
Cited
US3012894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |