Patent US3889138A successfully refreshed from Google Patents.
Patent US1507327A successfully refreshed from Google Patents.
US1507327A
Expired / Lapsed
US
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Process of coating edges of lenses
Assignee: American Optical Corp
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Filing: 1922-08-11
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Granted: 1924-09-02
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Expires: 1942-08-11
Abstract
No abstract record available.
Inventors
- 👤 William J Wrighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:59
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/20; C03B23/22; B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00865; G; G02; G02C; G02C1/00; G02C1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1927-09-02 | 1928-03-03 | 1928-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-09-02 | 1932-03-03 | 1932-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-09-02 | 1936-03-03 | 1936-09-02 | $7700.00 | Window Closed / Lapsed |