Patent US3807388A successfully refreshed from Google Patents.
US3101709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Face masks
Assignee: Individual
•
Filing: 1959-04-06
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Granted: 1963-08-27
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Expires: 1979-04-06
Abstract
No abstract record available.
Inventors
- 👤 Lou A Gruenewaelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:54
CPC Classifications
A; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A FACE MASK COMPRISING A FLEXIBLE SHEET-LIKE PORTION CONSISTING OF TWO SUBSTANTIALLY RECTANGULAR PLIES, EACH OF WHICH IS PROVIDED WITH A LAYER OF THERMOPLASTIC SYNTHETIC RESIN ON ITS INNER FACE, SAID SHEET-LIKE PORTION BEING PROVIDED WITH A PLURALITY OF PERFORATIONS, AND A POROUS FILERING ELEMENT CONTAINING LESS THAN 1% BY WEIGHT OF PHENYL MERCURIC ACETATE AND BEING SECURED TO SAID BODY PORTION AND COVERING SAID PERFORATIONS, SAID BODY PORTION BEING SUBSTANTIALLY AIR IMPERVIOUS EXCEPT AT SAID PERFORATIONS SO THAT AIR PASSING THROUGH SAID BODY PORTION WILL TRAVEL THROUGH SAID PERFORATIONS AND FILTERING ELEMENT.
Claim 2
Dependent Claim
93 words
A FACE MASK COMPRISING A FLEXIBLE SHEET-LIKE PORTION CONSISTING OF TWO SUBSTANTIALLY RECTANGULAR PLIES, EACH OF WHICH IS PROVIDED WITH A LAYER OF THERMOPLASTIC SYNTHETIC RESIN ON ITS INNER FACE, SAID SHEET-LIKE PORTION BEING PROVIDED WITH A PLURALITY OF PERFORATIONS, AND A POROUS FILERING ELEMENT CONTAINING LESS THAN 1% BY WEIGHT OF PHENYL MERCURIC ACETATE AND BEING SECURED TO SAID BODY PORTION AND COVERING SAID PERFORATIONS, SAID BODY PORTION BEING SUBSTANTIALLY AIR IMPERVIOUS EXCEPT AT SAID PERFORATIONS SO THAT AIR PASSING THROUGH SAID BODY PORTION WILL TRAVEL THROUGH SAID PERFORATIONS AND FILTERING ELEMENT.
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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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |