Patent US3652491A successfully refreshed from Google Patents.
US3652491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boron-reinforced composite
Assignee: Monsanto Co
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Filing: 1968-08-20
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Granted: 1972-03-28
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Expires: 1988-08-20
Abstract
Abstract A SHAPED COMPOSITE STRUCTURE COMPRISING BORON FIBER AS REINFORCING FILLER IN A MATRIX COMPRISING THE ZINC SALT OF AN ACRYLIC POLYMER, AND THE METHOD OF PREPARING THE SAME WHICH COMPRISES HEATING IN A MOLD AT A TEMPERATURE OF FROM ABOUT 175*C. TO 400*C. AND A PRESSURE OF FROM ABOUT 5,000 P.S.I. TO 50,000 P.S.I. MIXTURE OF ZINC OXIDE AND AN ACRYLIC ACID POLYMER IN CONTACT WITH THE BORON FIBER.
Inventors
- 👤 Lawrence E Nielsen
- 👤 Joseph E Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:12
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |