Patent US3528135A successfully refreshed from Google Patents.
US3528135A
Expired / Lapsed
US
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Gasket for molding plastic optical elements
Assignee: Signet Optical Corp
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Filing: 1968-02-19
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Granted: 1970-09-15
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Expires: 1988-02-19
Abstract
No abstract record available.
Inventors
- 👤 Donald R Reiterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:21
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/0048; B29D11/00528; B29C; B29C33/00; B29C33/0038; B29D11/00413; B29L; B29L2031/00; B29L2031/76; B29L2031/7602; Y; Y10; Y10S; Y10S425/00; Y10S425/044; Y10S425/808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2431927A
Cited
US3222432A
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US3056166A
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US3331102A
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US3211811A
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US3330331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |