Patent US3919473A successfully refreshed from Google Patents.
US3801690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closing mold halves on stretched portion of individual parison preform at orientation temperature
Assignee: Phillips Petroleum Co
•
Filing: 1972-02-16
•
Granted: 1974-04-02
•
Expires: 1992-02-16
Abstract
Abstract IN A PROCESS FOR BLOW MOLDING BIAXIALLY ORIENTED HOLLOW ARTICLES FROM TUBULAR PARSONS, SAID PARISON IS STRETCHED AXIALLY AND THEREAFTER MOLD HALVES ARE CLOSED ON SAID THUS STRETCHED PARISONS; A PORTION OF SAID THUS STRETCHED PARISON ADJACENT ONE END CAN BE EXPANDED OUT INTO CONFORMITLY WITH A NECK-FORMING ZONE; THE OTHER END CAN BE SEALED AND SEVERED BY SAID MOLD HALVES.
Inventors
- 👤 D Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:39
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/58; B29C49/02; B29C49/04; B29C49/04102; B29C49/08; B29C49/10; B29C49/14; B29C49/76; B29C2949/00; B29C2949/07; B29C2949/079; B29C2949/08; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |