Patent US2462348A successfully refreshed from Google Patents.
US3563839A
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Method of forming weakened tear lines and the article formed thereby
Assignee: Foster Grant Co Inc
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Filing: 1968-08-01
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Granted: 1971-02-16
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Expires: 1988-08-01
Abstract
Abstract THE METHOD OF PROVIDING WEAKENED TEAR LINES IN HEATDESTRUCTIBLE MATERIAL BY THERMALLY DESTROYING A PORTION OF THE THICKNESS OF THE MATERIAL ALONG DESIRED PATHS.
Inventors
- 👤 Roy R Divis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:25
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/006; B32; B32B; B32B27/00; B32B27/32; B26F; B26F3/00; B26F3/002; B26F3/06; B26F3/08; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5627; B29C44/5636; B29C59/00; B29C59/007; B32B27/06; B32B27/065; B32B5/00; B32B5/18; B65; B65D; B65D29/00; B65D29/04; B29C37/00; B29C37/0053; B29C37/0057; B29C59/02; B29L; B29L2028/00; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2305/00; B32B2305/38; B32B2307/00; B32B2307/50; B32B2307/582; B32B2323/00; B32B2323/04; Y; Y10; Y10S; Y10S229/00; Y10S229/927; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T428/00; Y10T428/15; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24116; Y10T428/24273; Y10T428/24298; Y10T428/24306; Y10T428/249921; Y10T428/249953; Y10T428/249981
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |