US4165765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass fiber reinforced thermosetting resin pipe wall construction
Assignee: Owens Corning
•
Filing: 1978-01-25
•
Granted: 1979-08-28
•
Expires: 1998-01-25
Abstract
Abstract Various pipe wall constructions comprising thermosetting resin, randomly disposed chopped glass fibers, sand, circumferentially extending continuous glass filaments, and axially extending glass fibers in various percentages in structural wall portions thereof, and having various protective inner liner and outer wall portions.
Inventors
- 👤 Agnar Gilbu
- 👤 Lee E. Pearson
- 👤 Mark E. Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:46
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/12; F16L9/121; B; B29; B29C; B29C41/00; B29C41/02; B29C41/08; B29C41/085; B29C53/00; B29C53/56; B29C53/58; B29C53/583; B29C53/80; B29C53/8008; B29C53/805; B29C70/00; B29C70/02; B29C70/021; B29C70/025; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; B29C70/205; B29C70/207; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29K2105/12; B29K2105/16; B29K2309/00; B29K2309/08; B29K2709/00; B29L; B29L2023/00; B29L2023/22; Y; Y10; Y10S; Y10S138/00; Y10S138/02; Y10S138/07
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
172 words
A pipe wall construction comprising a relatively thin, sand-free, resin-rich, glass fiber reinforced thermosetting resin protective inner liner portion, a relatively thick intermediate structural wall portion constituting the load-bearing portion of the pipe wall construction as designed and including by weight from 30% to 60% thermosetting resin, from 1% to 45% sand, from 3% to 25% randomly disposed chopped glass fibers, and from 1% to 60% circumferentially extending continuously wound glass filaments, the resin, sand, chopped glass fibers, and continuously wound glass filaments of the structural wall portion being distributed uniformly, whereby in a cross section of the pipe wall construction the structural wall portion appears to be a single homogeneous layer as distinct from plural layers of different compositions, and a relatively thin, resin-rich, glass fiber reinforced thermosetting resin protective outer wall portion, the glass fiber reinforcement of the relatively thin, resin-rich, protective inner liner and outer wall portions affording corrosion resistance by preventing surface cracking otherwise likely to occur if the inner liner and outer wall portions were entirely resin.
Claim 2
Dependent Claim
172 words
A pipe wall construction comprising a relatively thin, sand-free, resin-rich, glass fiber reinforced thermosetting resin protective inner liner portion, a relatively thick intermediate structural wall portion constituting the load-bearing portion of the pipe wall construction as designed and including by weight from 30% to 60% thermosetting resin, from 1% to 45% sand, from 3% to 25% randomly disposed chopped glass fibers, and from 1% to 60% circumferentially extending continuously wound glass filaments, the resin, sand, chopped glass fibers, and continuously wound glass filaments of the structural wall portion being distributed uniformly, whereby in a cross section of the pipe wall construction the structural wall portion appears to be a single homogeneous layer as distinct from plural layers of different compositions, and a relatively thin, resin-rich, glass fiber reinforced thermosetting resin protective outer wall portion, the glass fiber reinforcement of the relatively thin, resin-rich, protective inner liner and outer wall portions affording corrosion resistance by preventing surface cracking otherwise likely to occur if the inner liner and outer wall portions were entirely resin.
Claim 3
Dependent Claim
21 words
A pipe wall construction as claimed in claim 1 wherein the liner portion is from 0.02 inches to 0.15 inches thick.
Claim 4
Dependent Claim
27 words
A pipe wall construction as claimed in claim 1 wherein the liner portion consists of a glass fiber surface mat, randomly disposed chopped glass fibers, and resin.
Claim 5
Dependent Claim
29 words
A pipe wall construction as claimed in claim 3 wherein the liner portion is from 60% to 95% resin by weight and from 5% to 40% glass fiber reinforcement.
Claim 6
Dependent Claim
29 words
A pipe wall construction as claimed in claim 3 wherein the liner portion is from 70% to 80% resin by weight and from 20% to 30% glass fiber reinforcement.
Claim 7
Dependent Claim
22 words
A pipe wall construction as claimed in claim 1 wherein the liner portion consists of a glass fiber surface mat and resin.
Claim 8
Dependent Claim
30 words
A pipe wall construction as claimed in claim 6 wherein the liner portion is from 90% to 95% resin by weight and from 5% to 10% surface mat by weight.
Claim 9
Dependent Claim
22 words
A pipe wall construction as claimed in claim 1 wherein the liner portion consists of randomly disposed chopped glass fibers and resin.
Claim 10
Dependent Claim
29 words
A pipe wall construction as claimed in claim 8 wherein the liner portion is from 70% to 80% resin by weight and from 20% to 30% chopped glass fibers.
Claim 11
Dependent Claim
22 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion is from 0.10 inches to 3.0 inches thick.
Claim 12
Dependent Claim
47 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion includes by weight from 35% to 45% resin, from 30% to 45% sand, from 10% to 20% randomly disposed chopped glass fibers, and from 3% to 7% circumferentially extending continuously wound glass filaments.
Claim 13
Dependent Claim
36 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion includes by weight substantially 40% resin, 40% sand, 15% randomly disposed chopped glass fibers, and 5% circumferentially extending continuously wound glass filaments.
Claim 14
Dependent Claim
47 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion includes by weight from 35% to 45% resin, from 22% to 32% sand, from 12% to 18% randomly disposed chopped glass fibers, and from 13% to 23% circumferentially extending continuously wound glass filaments.
Claim 15
Dependent Claim
36 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion includes by weight substantially 40% resin, 25% sand, 15% randomly disposed chopped glass fibers, and 20% circumferentially extending continuously wound glass filaments.
Claim 16
Dependent Claim
36 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion includes by weight substantially 40% resin, 30% sand, 15% randomly disposed chopped glass fibers, and 15% circumferentially extending continuously wound glass filaments.
Claim 17
Dependent Claim
55 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion includes by weight from 35% to 45% resin, from 22% to 28% sand, from 3% to 7% randomly disposed chopped glass fibers, from 17% to 23% circumferentially extending continuously wound glass filaments, and from 5% to 15% axially extending glass fibers.
Claim 18
Dependent Claim
41 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion includes by weight substantially 40% resin, 25% sand, 5% randomly disposed chopped glass fibers, 20% circumferentially extending continuously wound glass filaments, and 10% axially extending glass fibers.
Claim 19
Dependent Claim
47 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion includes by weight from 35% to 45% resin, from 15% to 25% sand, from 12% to 18% randomly disposed chopped glass fibers, and from 22% to 28% circumferentially extending continuously wound glass filaments.
Claim 20
Dependent Claim
36 words
A pipe wall construction as claimed in claim 1 wherein the structural wall portion includes by weight substantially 40% resin, 20% sand, 15% randomly disposed chopped glass fibers, and 25% circumferentially extending continuously wound glass filaments.
Claim 21
Dependent Claim
22 words
A pipe wall construction as claimed in claim 1 wherein the outer wall portion is from 0.01 inches to 0.10 inches thick.
Claim 22
Dependent Claim
23 words
A pipe wall construction as claimed in claim 1 wherein the outer wall portion consists of randomly disposed chopped glass fibers and resin.
Claim 23
Dependent Claim
30 words
A pipe wall construction as claimed in claim 21 wherein the outer wall portion is from 70% to 80% resin by weight and from 20% to 30% chopped glass fibers.
Claim 24
Dependent Claim
28 words
A pipe wall construction as claimed in claim 1 wherein the outer wall portion consists of a glass fiber surface mat, randomly disposed chopped glass fibers, and resin.
Claim 25
Dependent Claim
30 words
A pipe wall construction as claimed in claim 23 wherein the outer wall portion is from 60% to 95% resin by weight and from 5% to 40% glass fiber reinforcement.
Claim 26
Dependent Claim
30 words
A pipe wall construction as claimed in claim 23 wherein the outer wall portion is from 70% to 80% resin by weight and from 20% to 30% glass fiber reinforcement.
Claim 27
Dependent Claim
23 words
A pipe wall construction as claimed in claim 1 wherein the outer wall portion consists of a glass fiber surface mat and resin.
Claim 28
Dependent Claim
31 words
A pipe wall construction as claimed in claim 26 wherein the outer wall portion is from 90% to 95% resin by weight and from 5% to 10% surface mat by weight.
Claim 29
Dependent Claim
166 words
A pipe wall construction comprising a relatively thin, sand-free, resin-rich, glass fiber reinforced thermosetting resin protective inner liner portion, a relatively thick intermediate structural wall portion constituting the load-bearing portion of the pipe wall construction as designed and including by weight from 28% to 60% thermosetting resin, from 3% to 25% randomly disposed chopped glass fibers, and from 1% to 60% circumferentially extending continuously wound glass filaments, the resin, chopped glass fibers, and continuously wound glass filaments of the structural wall portion being distributed uniformly, whereby in a cross section of the pipe wall construction the structural wall portion appears to be a single homogeneous layer as distinct from plural layers of different compositions, and a relatively thin, resin-rich, glass fiber reinforced thermosetting resin protective outer wall portion, the glass fiber reinforcement of the relatively thin, resin-rich, protective inner liner and outer wall portions affording corrosion resistance by preventing surface cracking otherwise likely to occur if the inner liner and outer wall portions were entirely resin.
Claim 30
Dependent Claim
166 words
A pipe wall construction comprising a relatively thin, sand-free, resin-rich, glass fiber reinforced thermosetting resin protective inner liner portion, a relatively thick intermediate structural wall portion constituting the load-bearing portion of the pipe wall construction as designed and including by weight from 28% to 60% thermosetting resin, from 3% to 25% randomly disposed chopped glass fibers, and from 1% to 60% circumferentially extending continuously wound glass filaments, the resin, chopped glass fibers, and continuously wound glass filaments of the structural wall portion being distributed uniformly, whereby in a cross section of the pipe wall construction the structural wall portion appears to be a single homogeneous layer as distinct from plural layers of different compositions, and a relatively thin, resin-rich, glass fiber reinforced thermosetting resin protective outer wall portion, the glass fiber reinforcement of the relatively thin, resin-rich, protective inner liner and outer wall portions affording corrosion resistance by preventing surface cracking otherwise likely to occur if the inner liner and outer wall portions were entirely resin.
Claim 31
Dependent Claim
21 words
A pipe wall construction as claimed in claim 28 wherein the liner portion is from 0.02 inches to 0.15 inches thick.
Claim 32
Dependent Claim
27 words
A pipe wall construction as claimed in claim 28 wherein the liner portion consists of a glass fiber surface mat, randomly disposed chopped glass fibers, and resin.
Claim 33
Dependent Claim
29 words
A pipe wall construction as claimed in claim 30 wherein the liner portion is from 60% to 95% resin by weight and from 5% to 40% glass fiber reinforcement.
Claim 34
Dependent Claim
29 words
A pipe wall construction as claimed in claim 30 wherein the liner portion is from 70% to 80% resin by weight and from 20% to 30% glass fiber reinforcement.
Claim 35
Dependent Claim
22 words
A pipe wall construction as claimed in claim 28 wherein the liner portion consists of a glass fiber surface mat and resin.
Claim 36
Dependent Claim
30 words
A pipe wall construction as claimed in claim 33 wherein the liner portion is from 90% to 95% resin by weight and from 5% to 10% surface mat by weight.
Claim 37
Dependent Claim
22 words
A pipe wall construction as claimed in claim 28 wherein the liner portion consists of randomly disposed chopped glass fibers and resin.
Claim 38
Dependent Claim
29 words
A pipe wall construction as claimed in claim 35 wherein the liner portion is from 70% to 80% resin by weight and from 20% to 30% chopped glass fibers.
Claim 39
Dependent Claim
22 words
A pipe wall construction as claimed in claim 28 wherein the structural wall portion is from 0.10 inches to 3.0 inches thick.
Claim 40
Dependent Claim
22 words
A pipe wall construction as claimed in claim 28 wherein the outer wall portion is from 0.01 inches to 0.10 inches thick.
Claim 41
Dependent Claim
23 words
A pipe wall construction as claimed in claim 28 wherein the outer wall portion consists of randomly disposed chopped glass fibers and resin.
Claim 42
Dependent Claim
30 words
A pipe wall construction as claimed in claim 39 wherein the outer wall portion is from 70% to 80% resin by weight and from 20% to 30% chopped glass fibers.
Claim 43
Dependent Claim
28 words
A pipe wall construction as claimed in claim 28 wherein the outer wall portion consists of a glass fiber surface mat, randomly disposed chopped glass fibers, and resin.
Claim 44
Dependent Claim
30 words
A pipe wall construction as claimed in claim 41 wherein the outer wall portion is from 60% to 95% resin by weight and from 5% to 40% glass fiber reinforcement.
Claim 45
Dependent Claim
30 words
A pipe wall construction as claimed in claim 41 wherein the outer wall portion is from 70% to 80% resin by weight and from 20% to 30% glass fiber reinforcement.
Claim 46
Dependent Claim
23 words
A pipe wall construction as claimed in claim 28 wherein the outer wall portion consists of a glass fiber surface mat and resin.
Claim 47
Dependent Claim
31 words
A pipe wall construction as claimed in claim 44 wherein the outer wall portion is from 90% to 95% resin by weight and from 5% to 10% surface mat by weight.
Claim 48
Dependent Claim
42 words
A pipe wall construction as claimed in claim 28 wherein the structural wall portion includes by weight from 28% to 45% resin, from 12% to 18% randomly disposed chopped glass fibers, and from 40% to 60% circumferentially extending continuously wound glass filaments.
Claim 49
Dependent Claim
34 words
A pipe wall construction as claimed in claim 28 wherein the structural wall portion includes by weight substantially 40% resin, 15% randomly disposed chopped glass fibers, and 45% circumferentially extending continuously wound glass filaments.
Claim 50
Dependent Claim
34 words
A pipe wall construction as claimed in claim 28 wherein the structural wall portion includes by weight substantially 30% resin, 15% randomly disposed chopped glass fibers, and 55% circumferentially extending continuously wound glass filaments.
Claim 51
Dependent Claim
50 words
A pipe wall construction as claimed in claim 28 wherein the structural wall portion includes by weight from 30% to 45% resin, from 3% to 15% randomly disposed chopped glass fibers, from 30% to 45% circumferentially extending continuously wound glass filaments, and from 5% to 25% axially extending glass fibers.
Claim 52
Dependent Claim
39 words
A pipe wall construction as claimed in claim 28 wherein the structural wall portion includes by weight substantially 40% resin, 5% randomly disposed chopped glass fibers, 35% circumferentially extending continuously wound glass filaments, and 20% axially extending glass fibers.
Claim 53
Dependent Claim
39 words
A pipe wall construction as claimed in claim 28 wherein the structural wall portion includes by weight substantially 40% resin, 10% randomly disposed chopped glass fibers, 37% circumferentially extending continuously wound glass filaments, and 13% axially extending glass fibers.
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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) | 1982-08-27 | 1983-02-26 | 1983-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-27 | 1987-02-26 | 1987-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-27 | 1991-02-26 | 1991-08-28 | $7700.00 | Window Closed / Lapsed |