Patent US3130002A successfully refreshed from Google Patents.
US3130002A
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Sodium phosphate glasses
Assignee: FMC Corp
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Filing: 1961-10-05
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Granted: 1964-04-21
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Expires: 1981-10-05
Abstract
No abstract record available.
Inventors
- 👤 Robert J Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:37
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/41; C01B25/412; C02; C02F; C02F5/00; C02F5/08; C02F5/086; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF INHIBITING THE CORROSION OF METAL IN CONTACT WITH WATER WHICH COMPRISES ADDING TO SAID WATER A SODIUM POLYPHOSPHATE GLASS HAVING IMPROVED RESISTANCE AGAINST REVERSION TO SODIUM ORTHOPHOSPHATE, SAID SODIUM POLYPHOSPHATE GLASS HAVING A MOLE RATIO OF (NA2O + H2O)/P2O5 OF 1.10 TO 1.065, A WEIGHT PERCENT P2O5 OF 68.5 TO 69.7%, AND POSSESSING TERMINAL GROUPS ON THE POLYPHOSPHATE CHAIN HAVING NO LESS THAN 75 MOLE PERCENT OH WITH THE REMAINDER BEING ONA GROUPS.
Claim 2
Independent Claim
76 words
THE METHOD OF INHIBITING THE CORROSION OF METAL IN CONTACT WITH WATER WHICH COMPRISES ADDING TO SAID WATER A SODIUM POLYPHOSPHATE GLASS HAVING IMPROVED RESISTANCE AGAINST REVERSION TO SODIUM ORTHOPHOSPHATE, SAID SODIUM POLYPHOSPHATE GLASS HAVING A MOLE RATIO OF (NA2O + H2O)/P2O5 OF 1.10 TO 1.065, A WEIGHT PERCENT P2O5 OF 68.5 TO 69.7%, AND POSSESSING TERMINAL GROUPS ON THE POLYPHOSPHATE CHAIN HAVING NO LESS THAN 75 MOLE PERCENT OH WITH THE REMAINDER BEING ONA GROUPS.
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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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |