US3423488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for casting resinous lenses in thermoplastic cast replica molds
Assignee: PPG Industries Inc
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Filing: 1966-05-11
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Granted: 1969-01-21
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Expires: 1986-05-11
Abstract
No abstract record available.
Inventors
- 👤 George H Bowser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:40
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/22; B29C39/42; B29C33/00; B29C33/38; B29C33/3842; B29C33/3857; B29C39/26; B29C39/40; B29D; B29D11/00; B29D11/00009; B29D11/00432; B29D11/00442; B29K; B29K2035/00; B29K2823/00; B29K2823/04; B29K2823/06; B29L; B29L2011/00; B29L2011/0016; Y; Y10; Y10S; Y10S425/00; Y10S425/808
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |