Patent US3737501A successfully refreshed from Google Patents.
US3737501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming plastic tubular articles
Assignee: OI Glass Inc
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Filing: 1970-10-20
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Granted: 1973-06-05
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Expires: 1990-10-20
Abstract
Abstract the present invention relates to apparatus and method for conveying and transforming tubular thermoplastic blanks into tubular pipet, medicine drippers, burette points, ampuls, and the like, while advancing continuously along a prescribed path. The invention has particular utility in forming disposable pipet made of thermoplastic material such as polystyrene and the like.
Inventors
- 👤 R Dunipace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:33
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/021; B26; B26D; B26D3/00; B26D3/16; B29; B29C; B29C31/00; B29C31/002; B29C55/00; B29C55/22; B29K; B29K2025/00; B29L; B29L2023/00; B29L2031/00; B29L2031/753
Claims Analysis
Total Claims: 0
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |