US3431967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-piece mold for molding an undercut rim,and method of molding
Assignee: 3M Co
•
Filing: 1964-08-12
•
Granted: 1969-03-11
•
Expires: 1984-08-12
Abstract
No abstract record available.
Inventors
- 👤 Richard D Hipp Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:19
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/20; B22D17/22; G; G01; G01M; G01M11/00; G01M11/02; G01M11/04; G02; G02B; G02B7/00; G02B7/02; G02B7/026; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1546824A
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US2366475A
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US2781548A
Cited
US2894287A
Cited
US2891283A
Cited
GB963056A
Cited
US3182218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |