Patent US3548459A successfully refreshed from Google Patents.
US3548459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shearing ring for split mold thermoforming
Assignee: Phillips Petroleum Co
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Filing: 1968-11-08
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Granted: 1970-12-22
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Expires: 1988-11-08
Abstract
No abstract record available.
Inventors
- 👤 Calvin D Dockery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:34
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/04; B29C49/00; B29C49/42; B29C49/48; B29C49/50; B29C51/26; B29C51/30; B29C51/32; B29C51/325; B29C51/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |