Patent US6629533B1 successfully refreshed from Google Patents.
US6629533B1
Expired / Lapsed
US
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Punctum plug with at least one anchoring arm
Assignee: Corza Ophthalmology Products Inc
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Filing: 2000-06-30
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Granted: 2003-10-07
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Expires: 2020-06-30
Abstract
Abstract A punctum plug generally includes a shaft and a head at a proximal end of the shaft. The shaft is provided with at least one circumferentially radiating flexible anchoring arm of varying radial extension at at least two locations along its length which is adapted to secure the punctum plug within the punctum of a wearer. The head has a concave proximal surface and a distal surface which tapers toward the shaft. A diameter of the head is substantially larger than a diameter of the shaft. According to a first embodiment of the invention, a plurality of anchoring arms in the form of symmetric circumferential rings are spaced a distance apart along a length of the shaft and define spaces therebetween. One or more of the rings has a diameter equal to or larger than the diameter of the head of the plug, and different rings preferably have different diameters. According to a second embodiment of the invention, a plurality of anchoring arms in the form of longitudinally offset flanges are spaced a distance apart along a length of the shaft. The offset flanges are offset relative to a plane extending axially through the shaft.
Inventors
- 👤 Nicholas J. Webb
- 👤 Richard W. Mendius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12131; A61B17/12159; A61B17/12099; A61F; A61F9/00; A61F9/007; A61F9/00772
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
79 words
A punctum plug for insertion into a punctum of a wearer, comprising: a) a shaft having a proximal end, a distal end, and a length; b) a plurality of circumferential rings radially extending from said shaft and spaced apart along said length of said shaft and defining spaces therebetween, at least one of said plurality of circumferential rings has a diameter larger than a diameter of said head; and c) a head at said proximal end of said shaft.
Claim 2
Dependent Claim
79 words
A punctum plug for insertion into a punctum of a wearer, comprising: a) a shaft having a proximal end, a distal end, and a length; b) a plurality of circumferential rings radially extending from said shaft and spaced apart along said length of said shaft and defining spaces therebetween, at least one of said plurality of circumferential rings has a diameter larger than a diameter of said head; and c) a head at said proximal end of said shaft.
Claim 3
Dependent Claim
30 words
A punctum plug according to claim 1 , wherein: said head and said shaft at least partially define an axial bore, said axial bore adapted to receive an insertion tool.
Claim 4
Dependent Claim
28 words
A punctum plug according to claim 1 , wherein: at least one of said plurality of circumferential rings has a diameter larger than a diameter of said head.
Claim 5
Dependent Claim
39 words
A punctum plug according to claim 1 , wherein: said plurality of circumferential rings include at least one proximal ring, one distal ring and an intermediate ring, at least two of said plurality of circumferential rings having different diameters.
Claim 6
Dependent Claim
16 words
A punctum plug according to claim 1 , wherein: said head tapers distally toward said shaft.
Claim 7
Dependent Claim
33 words
A punctum plug according to claim 1 , wherein: a tip is provided at said distal end of said shaft, said tip having a diameter no greater than a diameter of said shaft.
Claim 8
Dependent Claim
20 words
A punctum plug according to claim 6 , wherein: said tip is one of pointed, rounded and truncated in shape.
Claim 9
Dependent Claim
19 words
A punctum plug according to claim 1 , wherein: said shaft, said circumferential rings, and said head are flexible.
Claim 10
Dependent Claim
93 words
A punctum plug for insertion into a punctum of a wearer comprising: a) a shaft having a proximal end, a distal end, and a length; b) a plurality of circumferential rings radially extending from said shaft and spaced apart along said length of said shaft and defining spaces therebetween, said plurality of circumferential rings including at least one proximal ring, one distal ring and an intermediate ring, said intermediate ring having a larger diameter than said proximal ring and said distal ring; and c) a head at said proximal end of said shaft.
Claim 11
Dependent Claim
93 words
A punctum plug for insertion into a punctum of a wearer comprising: a) a shaft having a proximal end, a distal end, and a length; b) a plurality of circumferential rings radially extending from said shaft and spaced apart along said length of said shaft and defining spaces therebetween, said plurality of circumferential rings including at least one proximal ring, one distal ring and an intermediate ring, said intermediate ring having a larger diameter than said proximal ring and said distal ring; and c) a head at said proximal end of said shaft.
Claim 12
Dependent Claim
69 words
A punctum plug for insertion into a punctum of a wearer comprising: a) a shaft having a proximal end, a distal end, and a length; b) a plurality of circumferential rings radially extending from said shaft and spaced apart along said length of said shaft and defining spaces therebetween; and c) a head at said proximal end of said shaft, said head: said head having a concave proximal surface.
Claim 13
Dependent Claim
69 words
A punctum plug for insertion into a punctum of a wearer comprising: a) a shaft having a proximal end, a distal end, and a length; b) a plurality of circumferential rings radially extending from said shaft and spaced apart along said length of said shaft and defining spaces therebetween; and c) a head at said proximal end of said shaft, said head: said head having a concave proximal surface.
Claim 14
Dependent Claim
62 words
A punctum plug for insertion into a punctum of a wearer, comprising: a) a shaft having a proximal end, a distal end, a circumference, and a length; b) a plurality of flanges which extending less than 360 degrees about the circumference and are spaced apart along said length of said shaft; and c) a head at said proximal end of said shaft.
Claim 15
Dependent Claim
62 words
A punctum plug for insertion into a punctum of a wearer, comprising: a) a shaft having a proximal end, a distal end, a circumference, and a length; b) a plurality of flanges which extending less than 360 degrees about the circumference and are spaced apart along said length of said shaft; and c) a head at said proximal end of said shaft.
Claim 16
Dependent Claim
27 words
A punctum plug according to claim 11 , wherein: said head and said shaft at least partially define an axial bore adapted to receive an insertion tool.
Claim 17
Dependent Claim
34 words
A punctum plug according to claim 11 , wherein: said head has a radial extension and at least one of said flanges has a radial extension greater than said radial extension of said head.
Claim 18
Dependent Claim
35 words
A punctum plug according to claim 11 , wherein: said plurality of flanges include at least a proximal flange, a distal flange and an intermediate flange, at least two of the flanges having different diameters.
Claim 19
Dependent Claim
25 words
A punctum plug according to claim 14 , wherein: said intermediate flange is of a larger diameter than said proximal flange and said distal flange.
Claim 20
Dependent Claim
16 words
A punctum plug according to claim 11 , wherein: said head tapers distally toward said shaft.
Claim 21
Dependent Claim
33 words
A punctum plug according to claim 11 , wherein: a tip is provided at a distal end of said shaft, said tip having a diameter no greater than a diameter of said shaft.
Claim 22
Dependent Claim
20 words
A punctum plug according to claim 17 , wherein: said tip is one of pointed, rounded and truncated in shape.
Claim 23
Dependent Claim
20 words
A punctum plug according to claim 11 , wherein: said shaft, said plurality of flanges, and said head are flexible.
Claim 24
Dependent Claim
14 words
A punctum plug according to claim 11 , wherein: said flanges are substantially semicircular.
Claim 25
Dependent Claim
65 words
A punctum plug for insertion into a punctum of a wearer comprising: a) a shaft having a proximal end, a distal end, a circumference, and a length; b) a plurality of flanges which are circumferentially offset and spaced apart along said length of said shaft; and c) a head at said proximal end of said shaft, said head; said head having a concave proximal surface.
Claim 26
Dependent Claim
65 words
A punctum plug for insertion into a punctum of a wearer comprising: a) a shaft having a proximal end, a distal end, a circumference, and a length; b) a plurality of flanges which are circumferentially offset and spaced apart along said length of said shaft; and c) a head at said proximal end of said shaft, said head; said head having a concave proximal surface.
Claim 27
Dependent Claim
53 words
A punctum plug for insertion into a punctum of a wearer, comprising: a) a longitudinally extending shaft having a proximal end, a distal end, and a length; b) a flexible flange radially extending from and helically coiled about said longitudinally extending shaft; and c) a head at said proximal end of said shaft.
Claim 28
Dependent Claim
53 words
A punctum plug for insertion into a punctum of a wearer, comprising: a) a longitudinally extending shaft having a proximal end, a distal end, and a length; b) a flexible flange radially extending from and helically coiled about said longitudinally extending shaft; and c) a head at said proximal end of said shaft.
Claim 29
Dependent Claim
27 words
A punctum plug according to claim 22 , wherein: said head and said shaft at least partially define an axial bore adapted to receive an insertion tool.
Claim 30
Dependent Claim
29 words
A punctum plug according to claim 22 , wherein: said flange has a portion which radially extends from said shaft greater than a maximum radial extension of said head.
Claim 31
Dependent Claim
36 words
A punctum plug according to claim 24 , wherein: said flange has a proximal portion, a distal portion, and an intermediate portion, said intermediate portion being of larger radial extension than said proximal and distal portions.
Claim 32
Dependent Claim
16 words
A punctum plug according to claim 22 , wherein: said head tapers distally toward said shaft.
Claim 33
Dependent Claim
34 words
A punctum plug according to claim 22 , wherein: a tip is provided at a distal end of said shaft, said tip having a diameter which does not exceed a diameter of said shaft.
Claim 34
Dependent Claim
20 words
A punctum plug according to claim 27 , wherein: said tip is one of pointed, rounded and truncated in shape.
Claim 35
Dependent Claim
21 words
A punctum plug according to claim 22 , wherein: said shaft, said plurality of said flanges, and said head are flexible.
Claim 36
Dependent Claim
53 words
A punctum plug for insertion into a punctum of a wearer comprising: a) a shaft having a proximal end, a distal end, a length; b) a flange extending from and helically coiled about said shaft; and c) a head at said proximal end of said shaft, said head having a concave proximal surface.
Claim 37
Dependent Claim
53 words
A punctum plug for insertion into a punctum of a wearer comprising: a) a shaft having a proximal end, a distal end, a length; b) a flange extending from and helically coiled about said shaft; and c) a head at said proximal end of said shaft, said head having a concave proximal surface.
Claim 38
Dependent Claim
57 words
A punctum plug for insertion into a punctum of a wearer, comprising: a) a shaft; b) anchoring means for anchoring said plug within the punctum, said anchoring means including at least one arm extending from said shaft at at least two axial locations along said shaft; and c) a head at a proximal end of said shaft.
Claim 39
Dependent Claim
57 words
A punctum plug for insertion into a punctum of a wearer, comprising: a) a shaft; b) anchoring means for anchoring said plug within the punctum, said anchoring means including at least one arm extending from said shaft at at least two axial locations along said shaft; and c) a head at a proximal end of said shaft.
Claim 40
Dependent Claim
25 words
A punctum plug according to claim 31 , wherein: said at least one anchoring means is at least one arm radially extending from said shaft.
Claim 41
Dependent Claim
32 words
A punctum plug according to claim 31 , wherein: said at least one anchoring means is at least one arm extending at an angle less than ninety degrees relative to said shaft.
Claim 42
Dependent Claim
17 words
A punctum plug according to claim 33 , wherein: said at least one arm forms a barb.
Claim 43
Dependent Claim
24 words
A punctum plug according to claim 34 , wherein: said barb is adapted to bend both toward said shaft and away from said shaft.
Claim 44
Dependent Claim
16 words
A punctum plug according to claim 34 , wherein: said at least one barb is curved.
Claim 45
Dependent Claim
29 words
A punctum plug according to claim 34 , wherein: said at least one arm include a portion which expands in size as said portion extends further from said shaft.
References Cited (Backward Citations)
US4056496A
Cited
US3949750A
Cited
GB2069339A
Cited
US4461295A
Cited
GB2160778A
Cited
US4660546A
Cited
US5049142A
Cited
US4886488A
Cited
US4915684A
Cited
US4959048A
Cited
US5171270A
Cited
US5522837A
Cited
US5283063A
Cited
US5334137A
Cited
US5417651A
Cited
US5423777A
Cited
US5626559A
Cited
US5601553A
Cited
US5723005A
Cited
US5645565A
Cited
US5766243A
Cited
US5830171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-10-06 | 2007-04-07 | 2007-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-10-06 | 2011-04-07 | 2011-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-10-06 | 2015-04-07 | 2015-10-07 | $7700.00 | Window Closed / Lapsed |