Patent US3229430A successfully refreshed from Google Patents.
US3229430A
Expired / Lapsed
US
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Unitary foldable choir riser
Assignee: Individual
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Filing: 1961-11-22
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Granted: 1966-01-18
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Expires: 1981-11-22
Abstract
No abstract record available.
Inventors
- 👤 Berg Willie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:37
CPC Classifications
E; E04; E04H; E04H3/00; E04H3/10; E04H3/12; E04H3/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A CHOIR RISER COMPRISING, A PLURALITY OF SUBSTANTIALLY FLAT ELONGATED STEPS OF INCREASING ELEVATION REARWARDLY, A SPACED PAIR OF FRONT AND REAR LEGS AT EACH END OF EACH OF THE STEPS, EACH OF SAID PAIRS BEING PIVOTED TO THE INSIDE OF ONE OF SAID STEPS, THE REAR LEGS OF ONE STEP BEING HINGED TO THE FRONT LEGS OF AN ADJACENT HIGHER STEP FOR RELATIVE HORIZONTAL MOVEMENT IN ONE DIRECTION WITH A SPACE BETWEEN SAID LEGS, AN ARCUATE RAIL CONSTITUTING A BRACE MEMBER BETWEEN THE LEGS IN EACH PAIR OF FRONT AND REAR LEGS, SAID ARCUATE RAIL EXTENDING FROM A POINT NEAR THE UPPER END OF EACH FRONT LEG TO A LOWER AND INTERMEDIATE POINT ON THE REAR LEG, A SEPARATE LATCH FOR EACH PAIR OF LEGS, SAID LATCH BEING PIVOTED AT THE REAR OF THE UNDERSIDE OF THE STEP, SAID LATCHES EACH HAVING AN END IN EMBRACING CONTACT WITH THE ARCUATE RAILS, SAID LATCHES WHEN IN EXTENDED LEG-BRACING POSITIONS EXTENDING DIAGONALLY FORWARD
Claim 2
Dependent Claim
162 words
A CHOIR RISER COMPRISING, A PLURALITY OF SUBSTANTIALLY FLAT ELONGATED STEPS OF INCREASING ELEVATION REARWARDLY, A SPACED PAIR OF FRONT AND REAR LEGS AT EACH END OF EACH OF THE STEPS, EACH OF SAID PAIRS BEING PIVOTED TO THE INSIDE OF ONE OF SAID STEPS, THE REAR LEGS OF ONE STEP BEING HINGED TO THE FRONT LEGS OF AN ADJACENT HIGHER STEP FOR RELATIVE HORIZONTAL MOVEMENT IN ONE DIRECTION WITH A SPACE BETWEEN SAID LEGS, AN ARCUATE RAIL CONSTITUTING A BRACE MEMBER BETWEEN THE LEGS IN EACH PAIR OF FRONT AND REAR LEGS, SAID ARCUATE RAIL EXTENDING FROM A POINT NEAR THE UPPER END OF EACH FRONT LEG TO A LOWER AND INTERMEDIATE POINT ON THE REAR LEG, A SEPARATE LATCH FOR EACH PAIR OF LEGS, SAID LATCH BEING PIVOTED AT THE REAR OF THE UNDERSIDE OF THE STEP, SAID LATCHES EACH HAVING AN END IN EMBRACING CONTACT WITH THE ARCUATE RAILS, SAID LATCHES WHEN IN EXTENDED LEG-BRACING POSITIONS EXTENDING DIAGONALLY FORWARD
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |