Patent US3451832A successfully refreshed from Google Patents.
US3451832A
Expired / Lapsed
US
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Retarded gypsum plaster compositions
Assignee: Domtar Inc
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Filing: 1965-10-22
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Granted: 1969-06-24
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Richard Andreas Kuntze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:04
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/16; C04B24/04; C04B24/12; C04B24/24; C04B24/28; C04B24/30; C04B28/00; C04B28/14; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/06; C04B2103/00; C04B2103/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |