US1722368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making lenses or the like
Assignee: Comstock and Wescott Inc
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Filing: 1927-08-01
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Granted: 1929-07-30
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Expires: 1947-08-01
Abstract
No abstract record available.
Inventors
- 👤 Daniel F Comstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:57
CPC Classifications
F; F21; F21V; F21V5/00; F21S; F21S41/00; F21S41/20; F21S41/285; F21V3/00; F21V3/04; G; G03; G03F; G03F5/00; F21W; F21W2107/00; F21W2107/10
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) | 1932-07-29 | 1933-01-28 | 1933-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-07-29 | 1937-01-28 | 1937-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-07-29 | 1941-01-28 | 1941-07-30 | $7700.00 | Window Closed / Lapsed |