Patent US3769052A successfully refreshed from Google Patents.
US3769052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plaster composition
Assignee: KURTZ ESTHER
•
Filing: 1971-05-17
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Granted: 1973-10-30
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Expires: 1991-05-17
Abstract
Abstract Plaster of paris of high strength is obtained from a composition comprising plaster and synthetic resin fiber flock. Particularly strong products are obtained with flock of polyester fiber, for example polyethylene terephthalate fiber.
Inventors
- 👤 L Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:45
CPC Classifications
C; C04; C04B; C04B16/00; C04B16/04; C04B16/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
A plaster composition according to claim 1 wherein said polyester comprises polyethylene terephthalate.
Claim 2
Dependent Claim
70 words
In a method of setting plaster wherein water is admixed with plaster of Paris to hydrate the plaster of Paris and the hydrated material is permitted to set, the improvement wherein synthetic polyester fiber flock having a length of up to about 1/4 inch is mixed with the plaster of Paris prior to setting of the hydrated material to increase the strength and decrease the brittleness of the set plaster.
Claim 3
Dependent Claim
22 words
A method according to claim 3 wherein the fiber flock is mixed with the plaster of Paris prior to incorporating water therein.
Claim 4
Dependent Claim
21 words
A method according to claim 3 wherein the fiber flock is mixed with the plaster of Paris after incorporating water therein.
Claim 5
Dependent Claim
31 words
A method according to claim 3 wherein said fiber flock is added in an amount of 3 to 50 percent by weight based on the weight of said plaster of Paris.
Claim 6
Dependent Claim
12 words
A method according to claim 3 wherein said polyester comprises polyethylene terephthalate.
References Cited (Backward Citations)
US3311516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |