US2907635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing polymeric phosphorus pentoxide
Assignee: Monsanto Chemicals Ltd
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Filing: 1957-10-08
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Granted: 1959-10-06
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Expires: 1977-10-08
Abstract
No abstract record available.
Inventors
- 👤 William F Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:54
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A METHOD OF MAKING POLYMERIC PHOSPHORUS PENTOXIDE FROM SOLID H-FORM PHOSPHORUS PENTOXIDE, WHICH METHOD COMPRISES HEATING SAID H-FORM IN A SOLID MIXTURE WITH AT LEAST AN EQUAL WEIGHT OF SOLID POLYMERIC PHOSPHORUS PENTOXIDE AT A TEMPERATURE OF AT LEAST 300*C. AT ATMOSPHERIC PRESSURE.
Claim 2
Independent Claim
43 words
A METHOD OF MAKING POLYMERIC PHOSPHORUS PENTOXIDE FROM SOLID H-FORM PHOSPHORUS PENTOXIDE, WHICH METHOD COMPRISES HEATING SAID H-FORM IN A SOLID MIXTURE WITH AT LEAST AN EQUAL WEIGHT OF SOLID POLYMERIC PHOSPHORUS PENTOXIDE AT A TEMPERATURE OF AT LEAST 300*C. AT ATMOSPHERIC PRESSURE.
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) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |