US3425438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antisyphon device
Assignee: American Metal Products Co
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Filing: 1965-10-04
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Granted: 1969-02-04
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Fay O Suffron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:12
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/102; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
AN ANTISYPHON DEVICE COMPRISING MEANS PROVIDING AN AIR GAP CHAMBER HAVING AN OPENING PROVIDING AN AIR GAP, INLET CONDUIT MEANS COMMUNICATING WITH SAID CHAMBER, OUTLET CONDUIT MEANS COMMUNICATING WITH SAID CHAMBER, SAID INLET CONDUIT MEANS HAVING A DISCHARGE OPENING SPACED FROM SAID OPENING PROVIDING AN AIR GAP, MEANS EXTENDING BETWEEN THE SAID DISCHARGE OPENING AND AN END OF SAID AIR GAP CHAMBER, SAID MEANS BEING CONSTRUCTED TO FORM A BARRIER EXTENDING ACROSS SAID AIR GAP CHAMBER IN A POSITION BETWEEN SAID DISCHARGE OPENING AND SAID AIR GAP OPENING, THE SAID MEANS INCLUDING AN ARCUATE PORTION HAVING A RADIUS OF CURVATURE SUBSTANTIALLY THE SAME AS THAT OF SAID DISCHARGE OPENING AND SAID BARRIER MEANS HAVING SUFFICIENT EXTENT AS TO EXTEND BELOW SAID AIR GAP OPENING, SAID AIR GAP CHAMBER BEING CIRCULAR IN CROSS-SECTION AND HAVING A TOP WALL AND SIDE WALLS, ITS OPENING BEING IN A SIDE WALL THEREOF, SAID BARRIER HAVING AN ARCUATE PORTION ADJACENT SAID AIR GAP OPENING, SAID ARCUATE PORTION BEING CONNECTED TO AND EXTENDING DOWNWARDLY FROM THE TOP WALL OF SAID AIR GAP CHAMBER, AND INCLUDING FLAT PORTIONS POSITIONED ALONG A DIAMETER OF SAID AIR GAP CHAMBER CONNECTING THE EDGES OF SAID ARCUATE PORTION TO THE SIDE WALLS OF SAID AIR GAP CHAMBER AND SUPPORTING THE ARCUATE PORTION WITHIN THE AIR GAP CHAMBER.
Claim 2
Dependent Claim
216 words
AN ANTISYPHON DEVICE COMPRISING MEANS PROVIDING AN AIR GAP CHAMBER HAVING AN OPENING PROVIDING AN AIR GAP, INLET CONDUIT MEANS COMMUNICATING WITH SAID CHAMBER, OUTLET CONDUIT MEANS COMMUNICATING WITH SAID CHAMBER, SAID INLET CONDUIT MEANS HAVING A DISCHARGE OPENING SPACED FROM SAID OPENING PROVIDING AN AIR GAP, MEANS EXTENDING BETWEEN THE SAID DISCHARGE OPENING AND AN END OF SAID AIR GAP CHAMBER, SAID MEANS BEING CONSTRUCTED TO FORM A BARRIER EXTENDING ACROSS SAID AIR GAP CHAMBER IN A POSITION BETWEEN SAID DISCHARGE OPENING AND SAID AIR GAP OPENING, THE SAID MEANS INCLUDING AN ARCUATE PORTION HAVING A RADIUS OF CURVATURE SUBSTANTIALLY THE SAME AS THAT OF SAID DISCHARGE OPENING AND SAID BARRIER MEANS HAVING SUFFICIENT EXTENT AS TO EXTEND BELOW SAID AIR GAP OPENING, SAID AIR GAP CHAMBER BEING CIRCULAR IN CROSS-SECTION AND HAVING A TOP WALL AND SIDE WALLS, ITS OPENING BEING IN A SIDE WALL THEREOF, SAID BARRIER HAVING AN ARCUATE PORTION ADJACENT SAID AIR GAP OPENING, SAID ARCUATE PORTION BEING CONNECTED TO AND EXTENDING DOWNWARDLY FROM THE TOP WALL OF SAID AIR GAP CHAMBER, AND INCLUDING FLAT PORTIONS POSITIONED ALONG A DIAMETER OF SAID AIR GAP CHAMBER CONNECTING THE EDGES OF SAID ARCUATE PORTION TO THE SIDE WALLS OF SAID AIR GAP CHAMBER AND SUPPORTING THE ARCUATE PORTION WITHIN THE AIR GAP CHAMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |