Patent US3515579A successfully refreshed from Google Patents.
US3515579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-fogging transparent material
Assignee: National Patent Development Corp
•
Filing: 1969-02-26
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Granted: 1970-06-02
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Expires: 1989-02-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Shepherd
- 👤 Francis E Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/24; B05D7/26; B29; B29D; B29D11/00; B29D11/00865; C; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C09; C09D; C09D133/00; C09D133/04; C09D133/14; C09D163/00; C09K; C09K3/00; C09K3/18; Y; Y10; Y10S; Y10S526/00; Y10S526/93; Y10S526/937; Y10T; Y10T428/00; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 0
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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) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |