Patent US3707148A successfully refreshed from Google Patents.
US3707148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated diaper
Assignee: Boots Co PLC
•
Filing: 1970-06-01
•
Granted: 1972-12-26
•
Expires: 1990-06-01
Abstract
Abstract Ammonia absorbing products are described which comprise a nonvolatile ammonia absorbing agent having a pK value of between 1.8 and 4.5. The agent may be carried in or on a sheet carrier or it may be included in a water permeable sachet. The products are of use as, or as part of, infants'' napkins.
Inventors
- 👤 Douglas Maxwell Bryce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:47
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/84; A61F13/8405; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/46; A61F2013/8408; A61F2013/8411; A61L2300/00; A61L2300/20; A61L2300/202; A61L2300/21; A61L2300/40; A61L2300/404; A61L2300/45
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
16 words
A napkin according to claim 1 in which the material that will absorb liquid is towelling.
Claim 2
Dependent Claim
22 words
A napkin according to claim 1 in which the material that will absorb liquid is cellulose wadding at least 3 mm thick.
Claim 3
Dependent Claim
24 words
A napkin according to claim 1 in which the ammonia absorbing agent is impregnated into or coated onto the material that will absorb liquid.
Claim 4
Dependent Claim
24 words
A napkin according to claim 1 including a napkin liner and in which the ammonia absorbing agent is in or on the napkin liner.
Claim 5
Dependent Claim
17 words
A napkin according to claim 1 in which the ammonia absorbing agent is in or on paper.
Claim 6
Dependent Claim
18 words
A napkin according to claim 1 in which the ammonia absorbing agent is in a water permeable sachet.
Claim 7
Dependent Claim
38 words
A napkin according to claim 1 in which the ammonia absorbing agent is a monomeric organic acid selected from the group consisting of citric acid, malic acid, maleic acid, malonic acid, succinic acid, tartaric acid and fumaric acid.
Claim 8
Dependent Claim
10 words
A napkin according to claim 1 additionally comprising a urease.
Claim 9
Dependent Claim
19 words
A napkin according to claim 1 in which the ammonia absorbing agent is in or on a sheet carrier.
Claim 10
Dependent Claim
70 words
A sheet carrier suitable for use in a napkin according to claim 10 and comprising a permeable textile base less than 1 mm thick and having one dimension of from 20 to 40 cm and the other dimension of from 10 to 25 cm and comprising at least 2 g of a monomeric organic acid as ammonia absorbing agent and having a pK value of 1.8 to 4.5, and 2-bromo-2-nitropropane-1,3-diol.
Claim 11
Dependent Claim
75 words
A sheet carrier suitable for use in a napkin according to claim 10 and comprising a roll of a permeable textile less than 1 mm thick, the roll being less than 25 mm wide, and comprising at least 40 grams per square meter of a monomeric organic acid as an ammonia absorbing agent and having a pK value of from 1.8 to 4.5, and 2-bromo-2-nitropropane-1,3-diol, the textile being capable of serving as a napkin liner.
Claim 12
Dependent Claim
68 words
A sheet carrier suitable for use in a napkin according to claim 10 and comprising a strip of paper from 1 to 25 cm wide and less than 1 mm thick and formed from short cellulose fibers and comprising at least 40 grams per square meter of a monomeric organic acid as an ammonia absorbing agent and having a pK value of from 1.8 to 4.5 and 2-bromo-2-nitropropane-1,3-diol.
References Cited (Backward Citations)
US2418907A
Cited
US2643969A
Cited
US2602042A
Cited
US2542909A
Cited
US2837462A
Cited
US3024207A
Cited
US3004895A
Cited
US3198828A
Cited
US3082118A
Cited
US3340875A
Cited
US3490454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |