Patent US3718937A successfully refreshed from Google Patents.
US3718937A
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Double lens goggle and method of manufacture
Assignee: SMITH R CO
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Filing: 1969-12-19
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Granted: 1973-03-06
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Expires: 1989-12-19
Abstract
Abstract A DOUBLE LENS GOGGLE, HAVING A FRAME FOR CONFORMING TO THE FACE OF THE USER, HAS A SEALED, DOUBLE LENS ASSEMBLY INCLUDING ONE LENS WITH A LATERAL, PHERIPHERAL FLANGE HAVING A CIRCUMFERENTIAL GROOVE INTO WHICH THE SECOND LENS IS MOUNTED, AND THE FLANGE PROVIDES MEANS FOR SECURING THE LENS ASSEMBLY TO THE FRAME. A VENT SYSTEM PROVIDES AN AIR FLOW IN THE AIR SPACE IN CONTACT WITH THE USER''S EYES.
Inventors
- 👤 R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:29
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/02; A61F9/025; A61F9/028
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |