Patent US973992A successfully refreshed from Google Patents.
Patent US3093401A successfully refreshed from Google Patents.
US3093401A
Expired / Lapsed
US
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Unit air filter latch
Assignee: American Air Filter Co Inc
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Filing: 1960-12-19
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Granted: 1963-06-11
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Expires: 1980-12-19
Abstract
No abstract record available.
Inventors
- 👤 Willem J Hagendoorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:07
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D29/07; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/23; B01D29/232; B01D46/00; B01D46/0002; B01D46/0005; B01D46/10; B01D2265/00; B01D2265/02; B01D2265/028; Y; Y10; Y10S; Y10S261/00; Y10S261/41; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1075; Y10T292/1083; Y10T292/1089
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
AN IMPROVEMENT IN LATCHES FOR RELEASABLY RETAINING AN AIR FILTER CELL WITHIN A FORWARDLY OPEN AUXILIARY FRAME HAVING A MARGINAL SEALING FLANGE ALONG ITS REAR, COMPRISING: A WIRE LATCHING ARM OF GENERALLY U-SHAPE HAVING AN ELONGATE, STRAIGHT BIGHT PORTION EXTENDING ALONG A MAJOR PART OF THE LENGTH OF A WALL OF SAID FRAME AND HAVING ITS ENDS PIVOTALLY SECURED TO THE INNER FACE OF SAID FRAME WALL SO THAT SAID BIGHT PORTION MOVES THROUGH AN ARC BETWEEN A CELL-ENGAGING-POSITION AND A CELL-RELEASING-POSITION; A CLIP OF ANGULAR CROSS-SECTION HAVING ONE EXTREMITY SLIDABLY AND ROTATABLY SECURED TO SAID BIGHT PORTION; AND DETENT MEANS ON THE INNER FACE OF SAID WALL AND SUBSTANTIALLY CENTERED RELATIVE TO SAID BIGHT PORTION FOR RECEIVING SAID CLIP IN INTERLOCKING RELATION WHEN SAID BIGHT PORTION IS IN SAID CELLENGAGING-POSITION.
References Cited (Backward Citations)
US1114510A
Cited
US2835211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |