US3338997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming plastic containers
Assignee: Dow Chemical Co
•
Filing: 1963-03-14
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Granted: 1967-08-29
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Expires: 1983-03-14
Abstract
No abstract record available.
Inventors
- 👤 Ruben A Tigner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:42
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/32; B29C51/325; B29C51/34; B29C51/343; B29C51/346; B65; B65D; B65D1/00; B65D1/12; B65D1/14; B65D1/16; B65D1/22; B65D1/26; B65D1/265; B29K; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/712; B29L2031/7132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF FORMING A NESTABLE FRUSTRO-CONICALLY SHAPED PLASTIC CONTAINER WITH A RAISED BOTTOM AND A SIDE WALL INCLINED OUTWARDLY FROM ITS BOTTOM TO TOP, SAID METHOD COMPRISING THE STEPS OF: (A) HEATING A PLASTIC SHEET TO A FORMABLE TEMPERATURE, (B) PLACING SAID SHEET UNDER A MALE DIE HAVING A RECESSED BOTTOM AND A PERIPHERAL LEG PORTION FOLLOWING THE ANGULAR INCLINATION OF SAID SIDE WALL, (C) DRAWING A VACUUM FROM BETWEEN SAID SHEET AND SAID LEG PORTION TO FORM SAID BOTTOM INTO REVERSE ANGULAR CONFIGURATION ABOUT SAID LEG PORTION, (D) AND ADVANCING SAID MALE DIE INTO A MOLD CAVITY TO SUBSEQUENTLY COMPLETE FORMING OF THE CONTAINER.
Claim 2
Independent Claim
106 words
A METHOD OF FORMING A NESTABLE FRUSTRO-CONICALLY SHAPED PLASTIC CONTAINER WITH A RAISED BOTTOM AND A SIDE WALL INCLINED OUTWARDLY FROM ITS BOTTOM TO TOP, SAID METHOD COMPRISING THE STEPS OF: (A) HEATING A PLASTIC SHEET TO A FORMABLE TEMPERATURE, (B) PLACING SAID SHEET UNDER A MALE DIE HAVING A RECESSED BOTTOM AND A PERIPHERAL LEG PORTION FOLLOWING THE ANGULAR INCLINATION OF SAID SIDE WALL, (C) DRAWING A VACUUM FROM BETWEEN SAID SHEET AND SAID LEG PORTION TO FORM SAID BOTTOM INTO REVERSE ANGULAR CONFIGURATION ABOUT SAID LEG PORTION, (D) AND ADVANCING SAID MALE DIE INTO A MOLD CAVITY TO SUBSEQUENTLY COMPLETE FORMING OF THE CONTAINER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |