US3546746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming hollow articles of work-strengthenable plastic materials
Assignee: Shell USA Inc
•
Filing: 1969-05-19
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Granted: 1970-12-15
•
Expires: 1989-05-19
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/02; B21C23/04; B21C23/14; B21C23/007; B29; B29C; B29C43/00; B29C43/02; B29C43/16; B29C43/32; B29C43/36; B29C43/361; B29C45/00; B29C45/14; B29C45/14065; B29C51/00; B29C51/002; B29C51/04; B29C51/08; B29C51/082; B29C67/00; B29C67/0003; B29C2043/3272; B29C2043/3283; B29C2043/3615; B29C2043/3618; B29C2043/3631; B29C33/00; B29C33/20; B29C33/56; B29C43/42; B29C51/10; B29K; B29K2023/00; B29K2023/10; B29K2023/12; B29K2055/00; B29K2086/00
Claims Analysis
Total Claims: 0
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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) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |