US3475246A
Expired / Lapsed
US
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Assignee: Phillips Petroleum Co
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Filing: 1967-02-20
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Granted: 1969-10-28
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Expires: 1987-02-20
Abstract
No abstract record available.
Inventors
- 👤 Stafford D Collie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:49
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/74; B29C65/743; B29C65/7441; B29C59/00; B29C59/007; B29C65/02; B29C65/18; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/131; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5346; B29C66/53461; B29C66/80; B29C66/81; B29C66/814; B29C66/8145; B29C66/81457; B29C66/83; B29C66/832; B29C66/8322; B65; B65D; B65D17/00; B65D17/28; B65D17/401; B65D17/4012; B29C66/70; B29C66/71; B65D2577/00; B65D2577/10; B65D2577/20; B65D2577/2041; B65D2577/2058; B65D2577/2075; B65D2577/2091; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROCESS FOR FORMING AN OPENING IN THE THERMOPLASTIC LID, COMPRISING THE STEPS OF BRINGING A PULL TAB ALSO CONSISTING OF A THERMOPLASTIC MATERIAL IN CONTACT WITH A PORTION OF THE PLASTIC LID ON THE TOP SURFACE THEREOF; APPLYING PRESSURE TO THE TOP SURFACE OF SAID PORTION OF THE LID; APPLYING HEAT TO THE BOTTOM SURFACE OF SAID PORTION OF THE LID, THEREBY CAUSING THE PULL TAB TO BE HEAT SEALED TO THE SAID PORTION OF THE LID AND ALSO CAUSING THE SAID PORTION OF THE LID TO BECOME SUFFICIENTLY STRUCTURALLY WEAKENED SO THAT WHEN THE PULL TAB IS REMOVED THIS PORTION OF THE LID WILL REMAIN ATTACHED TO THE PULL TAB AND THEREBY CAUSE AN OPENING TO BE MADE IN THE LID.
Claim 2
Dependent Claim
123 words
A PROCESS FOR FORMING AN OPENING IN THE THERMOPLASTIC LID, COMPRISING THE STEPS OF BRINGING A PULL TAB ALSO CONSISTING OF A THERMOPLASTIC MATERIAL IN CONTACT WITH A PORTION OF THE PLASTIC LID ON THE TOP SURFACE THEREOF; APPLYING PRESSURE TO THE TOP SURFACE OF SAID PORTION OF THE LID; APPLYING HEAT TO THE BOTTOM SURFACE OF SAID PORTION OF THE LID, THEREBY CAUSING THE PULL TAB TO BE HEAT SEALED TO THE SAID PORTION OF THE LID AND ALSO CAUSING THE SAID PORTION OF THE LID TO BECOME SUFFICIENTLY STRUCTURALLY WEAKENED SO THAT WHEN THE PULL TAB IS REMOVED THIS PORTION OF THE LID WILL REMAIN ATTACHED TO THE PULL TAB AND THEREBY CAUSE AN OPENING TO BE MADE IN THE LID.
References Cited (Backward Citations)
US3032463A
Cited
US3297508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |