Patent BE532679A successfully refreshed from Google Patents.
Patent US3278943A successfully refreshed from Google Patents.
US3278943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Movable transparent shutter for a welder's helmet
Assignee: Individual
•
Filing: 1964-06-01
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Granted: 1966-10-18
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Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 Curtis T Manz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:15
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A61F9/061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A WELDER''S HELMET HAVING A SIGHT OPENING THEREIN THROUGH WHICH THE USER MAY SEE, SPACED TRACKS DETACHABLY MOUNTED IN SAID HELMET, A FRAME MOUNTED IN SAID TRACKS AND A TRANSPARENT WINDOW MOUNTED IN SAID FRAME, A LATCH BAR MOUNTED IN SAID FRAME MOVEBLE RLATIVE TO THE TRACK, SPRING MEANS URGING THE LATCH BAR TOWARDS THE TRACKS, AND MEANS IN THE TRACK BY SAID LATCH BAR.
Claim 2
Dependent Claim
66 words
IN A WELDER''S HELMET HAVING A SIGHT OPENING THEREIN THROUGH WHICH THE USER MAY SEE, SPACED TRACKS DETACHABLY MOUNTED IN SAID HELMET, A FRAME MOUNTED IN SAID TRACKS AND A TRANSPARENT WINDOW MOUNTED IN SAID FRAME, A LATCH BAR MOUNTED IN SAID FRAME MOVEBLE RLATIVE TO THE TRACK, SPRING MEANS URGING THE LATCH BAR TOWARDS THE TRACKS, AND MEANS IN THE TRACK BY SAID LATCH BAR.
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |