Patent US3773602A successfully refreshed from Google Patents.
US3773602A
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Simulative keystone
Assignee: MERIDIAN DECORATOR ACC IMPORTS
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Filing: 1971-02-08
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Granted: 1973-11-20
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Expires: 1991-02-08
Abstract
Abstract A composition and process for producing objects of simulative keystone, a naturally occurring fossiliforous coral formation which is indigenous to the Florida Keys. A water-extended polyester resin is mixed with a cobalt salt and a tertiary aromatic amine, followed by the addition of a ketone peroxide, and cast into a keystone mold. Curing takes place rapidly at room temperatures, yeilding a molded object closely resembling natural keystone in color, texture, appearance, and other superficial characteristics.
Inventors
- 👤 R Killmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:28
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31794
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |