US3554913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction reduction by copolymer of n-alkyl methacrylates and methacrylic acid in solution
Assignee: United States Department of the Army
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Filing: 1969-08-15
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Granted: 1971-01-12
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Expires: 1989-08-15
Abstract
Abstract A COPOLYMER OF N-ALKYL METHACRYLATES AND METHACRYLIC ACID WHEREIN THE ALKYL GROUP MAY VARY FORM 14 TO 22 CARBON ATOMS, WHICH WHEN APPLIED IN SOLUTION, REDUCES THE FRICTION OF SOLID SURFACES.
Inventors
- 👤 Henry Gisser
- 👤 Marco Petronio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:57
CPC Classifications
C; C10; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1818; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |