US4783857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture permeable protector for protecting hands and fingers
Assignee: Toyo Tire Corp
•
Filing: 1986-10-31
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Granted: 1988-11-15
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Expires: 2006-10-31
Abstract
Abstract A moisture permeable protector such as gloves, fingerstalls, etc. for protecting hands and fingers at workshop, etc. utilizing a polyurethane film which has excellent moisture permeability. The film is made of polyurethane polymer having a polyoxyethylene content of 15-62% in a polyesterpolyol having a molecular weight of 3000 or less. The moisture permeability (g/m 2 ,24 hours) of the film is 1500 or higher per 45 micron thickness, and the water absorption swelling ratio is 30% or less.
Inventors
- 👤 Takashi Suzuki
- 👤 Noburu Nishikawa
- 👤 Tomio Shimizu
- 👤 Toshio Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:31
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4286; A; A41; A41D; A41D19/00; A41D19/0055; C08G18/4244; C08G18/4247; C08G18/4252
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
99 words
A moisture permeable protector for protecting hands and fingers consisting of a polyurethane thin film having excellent moisture permeability and a low water absorption swelling ratio which is made of polyurethane polymer having a polyoxyethylene content of 15-62%; said polyurethane polymer being obtained by reacting a polyesterpolyol with an organic polyisocyanate in the presence of a chain elongation agent; said polyesterpolyol having a polyoxyethylene content of 17-70% and a molecular weight of 500-3000 and being obtained by reacting polyethyleneglycol having a molecular weight of 200-600 with organic dicarboxylic acid along or dicarboxylic acid and ε-caprolactone and/or short chain polyol.
Claim 2
Dependent Claim
99 words
A moisture permeable protector for protecting hands and fingers consisting of a polyurethane thin film having excellent moisture permeability and a low water absorption swelling ratio which is made of polyurethane polymer having a polyoxyethylene content of 15-62%; said polyurethane polymer being obtained by reacting a polyesterpolyol with an organic polyisocyanate in the presence of a chain elongation agent; said polyesterpolyol having a polyoxyethylene content of 17-70% and a molecular weight of 500-3000 and being obtained by reacting polyethyleneglycol having a molecular weight of 200-600 with organic dicarboxylic acid along or dicarboxylic acid and ε-caprolactone and/or short chain polyol.
Claim 3
Dependent Claim
36 words
A protector according to claim 1, wherein said film has a moisture permeability (g/m 2 , 24 hours) of 1500 or higher and a water absorption swelling ratio of 30% or less per 45 micron thickness.
References Cited (Backward Citations)
US2871218A
Cited
GB859640A
Cited
GB1273524A
Cited
US3709864A
Cited
US3879764A
Cited
US4497072A
Cited
US4545841A
Cited
US4670330A
Cited
US4660228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |