Patent US4716042A successfully refreshed from Google Patents.
US4716042A
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Stabilized coated aspirin tablets
Assignee: Wyeth LLC
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Filing: 1986-06-16
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Granted: 1987-12-29
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Expires: 2006-06-16
Abstract
Abstract Coated aspirin tablets/caplets are provided wherein acetylsalicylic acid decomposition is inhibited by incorporation therein prior to coating of citric, alginic or glutamic acids of mixtures thereof.
Inventors
- 👤 Robert G. Blank
- 👤 Ronald W. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:31
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2886; A61K31/00; A61K31/60; A61K9/2004; A61K9/2013; A61K9/2022; A61K9/205; A61K9/2806; A61K9/2833; A61K9/286; A61K9/2866
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A film coated aspirin tablet/caplet containing as the active ingredient a material selected from the group consisting of aspirin and aspirin with caffeine wherein acetylsalicylic acid decomposition is inhibited by incorporation therein prior to coating of a small decomposition inhibiting amount of an acid selected from the group consisting of citric acid, alginic acid, glutamic acid and admixtures thereof, the coated tablet/caplet having been film or enteric coated from an aqueous solution of a film or enteric coating material.
Claim 2
Dependent Claim
79 words
A film coated aspirin tablet/caplet containing as the active ingredient a material selected from the group consisting of aspirin and aspirin with caffeine wherein acetylsalicylic acid decomposition is inhibited by incorporation therein prior to coating of a small decomposition inhibiting amount of an acid selected from the group consisting of citric acid, alginic acid, glutamic acid and admixtures thereof, the coated tablet/caplet having been film or enteric coated from an aqueous solution of a film or enteric coating material.
Claim 3
Dependent Claim
27 words
The coated aspirin tablet of claim 1 wherein the decomposition inhibiting amount of the acid is 0.5% to 3% by weight based upon the weight of aspirin.
Claim 4
Dependent Claim
47 words
A coated tablet/caplet consisting essentially of aspirin as the active ingredient wherein acetylsalicylic acid decomposition is inhibited by incorporation therein prior to coating of a small decomposition inhibiting amount of an acid selected from the group consisting of citric acid, alginic acid, glutamic acid and admixtures thereof.
Claim 5
Dependent Claim
47 words
A coated tablet/caplet consisting essentially of aspirin as the active ingredient wherein acetylsalicylic acid decomposition is inhibited by incorporation therein prior to coating of a small decomposition inhibiting amount of an acid selected from the group consisting of citric acid, alginic acid, glutamic acid and admixtures thereof.
Claim 6
Dependent Claim
27 words
The coated aspirin tablet of claim 3 wherein the decomposition inhibiting amount of the acid is 0.5% to 3% by weight based upon the weight of aspirin.
References Cited (Backward Citations)
US2101867A
Cited
US2801951A
Cited
US3256111A
Cited
US3981984A
Cited
US4001390A
Cited
US4017647A
Cited
US4167558A
Cited
US4302440A
Cited
US4302440B1
Cited
US4414198A
Cited
US4555399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |